Welcome!
Are you looking for an open source alternative to commercial solutions?
Do you want to learn how to use new tools that make your work, research, or hobbies easier?
Choose a topic that you are interested in and start exploring. Each entry point is a theme area in which you will find not only useful tools, but also tutorials how to use them. Some projects are funded by the NLnet Foundation, while others operate independently. All, however, are driven by passionate open-source communities. In addition, you will also find a comparison of the commercial and open source tools that are most widely used in that area.
×2D2D and 3D Content3D3D Model Management3D Model Sharing3D Printing Community3D Viewer6LoWPANAIALSA IntegrationAOSPAPNG SupportARASICActivityPubActivityPub FederationActivityPub IntegrationAdobe Flash AlternativeAndroidAnimated PNG SupportApplicationsAudio System DevelopmentAutomotive DiagnosticsBuild automationC LibraryCGRACables PatchesCalligra SuiteCloud securityCommunicationCompact Network SolutionCompression FormatsCompression StandardsConfiguration managementCorporate TransparencyCryptographyCurve25519CycloneDXDAWN projectDCAT StandardDHTDataData CatalogsData MetricsData ModelingData Set DescriptionsDebug Adapter ProtocolDebuggingDecentralised SolutionsDecentralized PlatformDecentralized SearchDecentralized applicationsDeclarative packagingDeclarative servicesDream2nixEDAsoftwareEEZ BusESG DataEcho CancellationEdge Cases & VariantsElliptic Curve CryptographyEmbedded LinuxEnergy ProfilingFOSDEM Video BoxFPGAFPGA-ProvenFallback MechanismFederated Video PlatformFediverseFile Specification AnalysisFormat DocumentationFree SoftwareFreedom of InformationFull disk encryptionFunctional programmingGNU HurdGNU/LinuxGPUGame EngineGamificationGenode OSGenodepkgsHardwareHardware DecoderIAMIETFISO 14229IdentityImage ProcessingInfrastructure managementInteractive Web ContentIoTJXL FormatJellyfishOPPKEMTLSKiCadKnowledge GraphsLanguage server protocolLet's Connect!Libre-SoCLibrePCBLibvipsLightweight KernelLiminixLinked DataLinuxLinux Audio LayerLuna PnRLunaPnR Phase 2Mach MicrokernelMapsMeasurementMemory-Safe bzip2Metadata ManagementMiddlewareMinetestMiruMobile Operating SystemNetworkingNixNix developmentNixOSNixcloudNo-Code ToolNode BindingODF StandardOpen DataOpen HardwareOpen SourceOpen Source CommunityOpen Source PlatformOpen StandardsOpen source servicesOpenCryptoHWOpenCryptoLinuxOpenGLOpenID ConnectOpenSourceOpenStreetMapOpenWRTOperating SystemsOverlay NetworkP2PP2P DistributionP4PCBDesignPNG File FormatPOSIX CompatibilityPackage managersPackagingPasskeysPeerTubePlace and RoutePost-Quantum CryptographyPower ProfilingPrivacyPrivacy and EthicsPrivacy-Focused EditingProgressive 3D Mesh TransmissionProxmox HypervisorPublic RecordsPulseAudioPythonRDFRISC-VRPLRauthyReal-Time ARReconfigurable HardwareRemote unlockingReproducible buildsRich Web ContentRobotnixRoot of trustRustRustLangSBOMSIMDSPARQLSVG FormatSandboxingSearchSecuritySecurity and Ease of UseSelf-HostingSelf-Sovereign IdentitySelf-hostingSelfPrivacyService abstractionService configurationServicesSoftware EngineeringSoftware FreedomSoftware supply chainStandalone VersionStatic type systemSupply Chain SecuritySupply chain securitySystemdTLSTLS PoolTPM attestationTransparencyType inferenceUDSUEFI Secure BootVPNVRVerticalsVideo AccelerationVideo EncodingVideo TranscodingVoIP ConferencingVulkanWearable ElectronicsWeb Platform ToolsWeb servicesWebGL and WebAssemblyWindows supportZIP File FormatZIP SecurityZip Bomb Preventionadraw:frameanimationartaudioautomationcameracodeccompressiondesigndrivereditingeditoreduVPNeducationengineffmpeg Integrationfpgagamegeospatialgpgpugpugraphicshardwarehubimagekicadlibnixloopsmeshmobile-nixosmodelmusicneuropilnixpkgsopensourcepcbdesignpicturepoint cloudprintsegmentationsensorsignalsmoltcpsoundstreamingterrainvframevideoviewervisualizationweb
Atomic Data
Fund: NGI Assure
2021-10-2023-06
Typesafe handling of LinkedData
DataAIData ModelingKnowledge Graphs
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Atomic Tables
Fund: NGI0 Entrust
2022-10-active
Self-hostable tabular structured data solution
DataAIData Modeling
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BlenderWeb
free 3D animation and compositing suite
Open Source PlatformRich Web ContentGame Engine2D and 3D ContentAdobe Flash Alternative
Visit
cables.gl
Creative tool for graphics and 3D content
Interactive Web ContentNo-Code ToolCables PatchesStandalone VersionOpen Source Community
Visit
Calligra-SVG
Improve fallback mechanisms in Calligra ODF loading and saving
ODF Standardadraw:frameFallback MechanismSVG FormatCalligra Suite
Visit
Data packages
Fund: NGI0 Entrust
2023-04-active
Specification + improved tooling for external data set descriptions
DataAIData Set Descriptions
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DataLab
Scientific platform for signal and image processing + visualisation
graphicssignal2Dimage
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Debug Adapter with Nix
Fund: NGI0 Entrust
2023-06-active
Implement the Debug Adaptor Protocol for Nix
NixDebuggingDebug Adapter ProtocolDAWN projectNix development
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Dream2nix
Fund: NGI Assure
2022-02-active
Automate reproducible packaging for various language ecosystems
Software EngineeringMiddlewareIdentityPackaging
VisitElliptic curve encryption speed-up using SIMD
Fund: NGI0 Entrust
2024-02-active
Low-level instructin optimisation for curve25519-dalek & Arkworks
Elliptic Curve CryptographySIMDRustCurve25519IoT
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EPE
Creative libre software tools for print media
graphicsprintdesignart
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F3D
Cross-platform, fast and minimalist 3D viewer
3Dviewergraphicsmodel
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Faircamp 1.0
Self-hostable, maintenance-free websites for audio producers
websoundaudiomusic
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Genealogos
Fund: NGI0 Entrust
2023-02-2024-06
Nix to SBOM generator targeting the CycloneDX format
Software supply chainNixCycloneDXSBOMnixpkgs
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Genodepkgs
Fund: NGI0 PET
2020-08-2022-10
When Genode and Nixpkgs meet
Genode OSNixGenodepkgsOperating Systemsnixpkgs
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GPGPU Playground
A virtual GPU to learn GPU programming
gpugpgpuVulkanOpenGL
VisitHardware 2D graphics engine
Additional functionality and better performance for FPGA-based 2D video controller
graphics2DFPGAhardware
VisitHardware accelerated 2D graphics
Design hardware accelerated 2D graphics using C to Verilog
graphics2DFPGAhardware
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Icosa Gallery
Open, decentralised platform for 3D assets
3D Model SharingActivityPubFediverse3D ViewerOpen Source Platform
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Inochi2D
Open source 2D animation/puppeteering framework
gameanimationdesignart
Visitiso14229
Fund: NGI Zero Core
2025-01-active
Universal Diagnostic Services for automotive diagnostics
ISO 14229UDSAutomotive DiagnosticsSecurityIoT
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iTowns
Visualise 2D and 3D geospatial data on virtual globes & maps
3Dvisualizationgeospatialterrain
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JellyfishOPP
Fund: NGI0 Entrust
2023-06-active
Open Hardware device for power profiling
JellyfishOPPOpen HardwarePower ProfilingIoTWearable Electronics
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KiCad
Professional open source electronics design application
KiCadOpenSourcePCBDesignEDAsoftware
VisitKiCad-IPC
Add RPC API, multichannel designs and schematic variant system to FOSS EDA suite
KiCadOpenSourcePCBDesignEDAsoftware
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kikit
tooling for automation of production of pcb designed in kicad
kicadopensourcepcbdesignautomation
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LetsConnect P2P
Fund: NGI Assure
2022-12-2024-08
Add P2P features to Let's Connect!
Let's Connect!VPNP2PIoTeduVPN
Visitlibnix
Fund: NGI Zero Core
2023-12-active
Native Nix on MS Windows
NixWindows supportlibnixPackage managersDeclarative packaging
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Libre-SOC Video Acceleration
Optimised video acceleration instructions for Libre RISC-V SoC
Libre-SoCFPGA-ProvenVideo Accelerationffmpeg IntegrationHardware Decoder
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LibrePCB
EDA software suite to develop printed circuit boards
LibrePCBOpenSourcePCBDesignEDAsoftware
VisitLibrePCB 2.0
New UI & powerful features for a future-proof LibrePCB
LibrePCBRustLangPCBDesignEDAsoftware
Visitlibspng APNG
Add Animated PNG (APNG) image read- and write support to libspng
C LibraryPNG File FormatAPNG SupportImage ProcessingSecurity and Ease of Use
Visitlibvips
Add animated PNG and enhanced JPEG XL support to libvips
Image ProcessingLibvipsAnimated PNG SupportJXL FormatNode Binding
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Liminix
Fund: NGI0 Entrust
2022-12-active
Nix-based OS for domestic WiFi routers, access points etc
LiminixOpenWRTNixEmbedded LinuxConfiguration management
VisitLinkedDataHub
Framework to handle Linked Data at scale
Open DataLinked DataKnowledge GraphsSPARQLRDF
VisitLoops
ActivityPub based sharing of short video clips
loopsvideohubstreaming
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Luna PnR
Fund: NGI0 PET
2021-02-2022-10
A versatile and fast new open-source place and route tool
Luna PnROpen SourceASICPlace and RouteIoT
VisitLunaPnR Phase 2
Fund: NGI0 Entrust
2022-12-active
A versatile and fast new open-source place and route tool
LunaPnR Phase 2Open SourceASICPlace and RouteIoT
VisitMaData
From datasets in DCAT catalogs to knowledge graphs
Open DataFreedom of InformationTransparencyLinked DataPublic Records
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Manyfold
Manage private collections of 3D models
3D Model Management3D Printing CommunityDecentralized PlatformActivityPub IntegrationProgressive 3D Mesh Transmission
Visit
MapComplete
Fund: NGI0 Entrust
2022-10-active
Thematics OpenStreetMap-viewer and editor
VerticalsSearchMapsOpenStreetMapGamification
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MinetestEdu
Education platform centered around 3D/cube world Minetest
Minetestgameeducation3D
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Miru
Multi-track video editing and real-time AR effects
MiruWeb Platform ToolsReal-Time ARWebGL and WebAssemblyPrivacy-Focused Editing
Visit
mobile-nixos
Fund: NGI0 PET
2019-04-2022-10
NixOS for mobile phones and tablets
mobile-nixosNixOSGNU/LinuxMobile Operating SystemSoftware Freedom
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Mobroute
Fund: NGI0 Entrust
2023-04-active
A minimalist FOSS public-transportation router/tool suite
VerticalsSearchMapsOpenStreetMap
VisitMultisoni
Modern and efficient real-time audio playback engine
enginesoundaudiomusic
Visit
neuropil
Fund: NGI0 Discovery
2019-06-2019-06
Privacy by design P2P search including IoT
neuropilP2PPrivacyDecentralized SearchIoT
Visitneuropil DHT
Fund: NGI Assure
2021-08-2024-08
DHT based overlay network
neuropilDHTOverlay NetworkSelf-Sovereign IdentityIoT
Visit
NixCloud
Fund: Internet Hardening Fund
2017-02-2019-05
Declarative internet services based on NixOS
NixOSTLS PoolDeclarative packagingSecurityDecentralized applications
VisitNixcloud Webservices
Declarative web services based on NixOS
NixOSWeb servicesDeclarative servicesNixcloudService abstraction
VisitNixOS/Clevis
Fund: NGI Assure
2023-04-2024-06
Unattented disk decryption with Clevis on NixOS
NixOSFull disk encryptionCloud securityRemote unlockingProxmox Hypervisor
VisitNominatim
Fund: NGI0 Discovery
2020-10-2022-09
Multi-lingual support in address search
Operating SystemsMapsOpenStreetMap
Visit
Ontogen
From datasets in DCAT catalogs to knowledge graphs
Open DataData CatalogsKnowledge GraphsMetadata ManagementDCAT Standard
Visit
Open Energy Profiler Toolset
Fund: NGI0 Entrust
2023-06-active
Modular open hardware Energy Profiling
Energy ProfilingOpen HardwareIoTEEZ BusOpen Source
VisitOpenCryptoHW
Fund: NGI Assure
2021-06-2024-07
CGRA-based reconfigurable open-source cryptographic IP cores
OpenCryptoHWCGRACryptographyReconfigurable HardwareIoT
VisitOpenCryptoLinux
Fund: NGI Assure
2022-06-2024-07
Make Linux run on OpenCryptoHW
OpenCryptoLinuxLinuxRISC-VOpenCryptoHWIoT
VisitOptimized Image Codecs
More efficient image handling for embedded systems
picturecompressioncodecimage
Visit
Organic Maps
Fund: NGI0 Entrust
2021-10-active
Privacy-focused Android & iOS offline maps application
ServicesApplicationsMapsP2POpenStreetMap
Visitp4-nix
Fund: NGI Assure
2022-08-2024-08
Combine Programming Protocol-independent Packet Processors language with declarative Nix packaging
P4NixNetworkingFPGAFunctional programming
Visit
Panoramax
Digital, collaborative immersive street level imagery
imagegraphicsviewerpicture
Visit
peermaps
Fund: NGI0 Discovery
2021-12-2022-10
Peer to peer cartography
VerticalsSearchMapsOpenStreetMapP2PDecentralised Solutions
Visit
PeerTube
A decentralised streaming video platform
PeerTubeFederated Video PlatformActivityPubP2P DistributionPrivacy and Ethics
VisitPeerTube - Remote Transcoding
Remote Transcoding for distributed video sharing network
PeerTubeFederated Video PlatformSelf-HostingActivityPub FederationVideo Transcoding
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PixelDroid/Media editor
Native PixelFed/ActivityPub image sharing app
imagegraphicseditorpicture
Visit
Port of AMDVLK/RADV 3D Driver to the Libre-SOC
Adapt Vulkan Drivers to the Libre-SoC
graphicsGPUVulkandriver
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Protomaps
Fund: NGI Zero Core
2023-10-active
Self-hostable maps based on OpenStreetMap data
ServicesApplicationsMapsOpenStreetMapVerticalsSearch
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PulseAudio
PulseAudio echo cancellation
PulseAudioEcho CancellationVoIP ConferencingLinux Audio LayerALSA Integration
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purl2sym
Fund: NGI0 Entrust
2023-10-2024-05
FOSS code symbols indexing system
Software EngineeringMeasurement
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Py3DTiles - Textured Mesh tiling
OGC 3DTiles 1.1 support for 3D tile conversion tool
graphicspoint cloud3Dmesh
VisitPython supply-chain with dream2nix
Fund: NGI Assure
2023-02-2024-08
Towards a secure, extensible & reproducible Python supply-chain with dream2nix
PythonNixDream2nixSoftware supply chainBuild automation
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Rauthy
Fund: NGI Zero Core
2025-01-active
Reliable OpenID Connect IdP and IAM solution
RauthyRustOpenID ConnectIAMPasskeys
VisitRenderling
Real-time rendering library on top of WebGPU
gpugpgpuVulkanOpenGL
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Replicant
Free software graphics drivers for mobile phones
graphics3DGPUOpenGL
VisitRobotnix
Fund: NGI0 PET
2020-10-2022-10
Reproducible Builds of Android with NIX
RobotnixAndroidNixAOSPReproducible builds
VisitSecuring NixOS services with systemd
Fund: NGI Assure
2021-10-2024-08
NixOS, with the nix package manager, services that can be installed and configured in a reproducible, declarative way
NixOSSystemdSecuritySandboxingService configuration
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Secushare Box
Operating system extension of Secushare for hardware devices
SecurityPrivacyCommunication
Visit
SelfPrivacy
Fund: NGI0 Entrust
2023-04-active
Reproducible self-hosting stack based on NixOS
Self-hostingNixOSSelfPrivacyOpen source servicesInfrastructure management
VisitSensifAI
AI driven image tagging
imagegraphicsAIpicture
Visitsmoltcp RPL
Fund: NGI Assure
2022-10-2024-08
Implement Routing Protocol for Low-Power and Lossy networks
smoltcpRustRPLIoT6LoWPAN
Visit
Sound in Hurd
Add audio capabilities to the multiserver microkernel from GNU
GNU HurdLightweight KernelPOSIX CompatibilityMach MicrokernelAudio System Development
Visit
Standardizing KEMTLS
Fund: NGI Assure
2021-06-2023-11
Post-quantum TLS without handshake signatures
KEMTLSPost-Quantum CryptographyTLSIoTIETF
Visit
StreetComplete
Fund: NGI0 Discovery
2019-04-2019-04
Fix open geodata with OpenStreetMap
VerticalsSearchMapsOpenStreetMap
VisitTiliqua
Open audio DSP for FPGAs
fpgasoundaudiomusic
VisitTISG trustable image sensor gateware
FPGA based camera providing encrypted video streams
FPGAcamerasensorimage
VisitType Inference for Nix
Fund: NGI Assure
2023-04-2024-08
Adding static typing and type inference to Nix
NixStatic type systemType inferencenixpkgsLanguage server protocol
VisitUEFI Secure Boot support for NixOS
Fund: NGI Assure
2021-12-2024-08
Add a self-sovereign root of trust as part of supply chain security
NixUEFI Secure BootSupply chain securityRoot of trustTPM attestation
Visit
uMap
Fund: NGI0 Entrust
2023-10-active
Collaborative custom mapping with OpenStreetMap data
VerticalsSearchMapsOpenStreetMap
Visit
Vframe
Use computer-vision to shield privacy in video
vframevideosegmentationediting
Visit
Video Box
Affordable open hardware video-to-network
FOSDEM Video BoxOpen HardwareFree SoftwareVideo EncodingCompact Network Solution
VisitWgMath
Open GPU scientific computing for every platform
gpugpgpuVulkanOpenGL
Visit
Wikirate Frameworks
Open corporate data in Wikirate through the lens of standards
Open DataCorporate TransparencyESG DataOpen StandardsData Metrics
Visit
WPE Android
Fund: NGI Zero Core
2023-04-2024-10
Embedded-friendly Webview based on WebKit
ServicesApplications
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XR Fragments
Discover, reference, navigate and query 3D online content
graphics3DVRAR
Visit
ZIP file format description
Documenting the ZIP file format for reverse engineers and developers
ZIP File FormatCompression StandardsFile Specification AnalysisEdge Cases & VariantsFormat Documentation
VisitZip linting and bzip2 in Rust
More secure handling of popular archive formats
ZIP SecurityCompression FormatsZip Bomb PreventionMemory-Safe bzip2Supply Chain Security
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ZSipOs
Fund: NGI0 PET
2019-06-2019-06
Open hardware for telephony encryption
HardwareOperating Systems
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