Free to list, always.No paid rankings. Every recommendation explains its trade-offs.
OpenSourceChoice
Submit a project
OpenSourceChoice
Weak copyleft

GNU Lesser General Public License v2.1

Older LGPL generation still common in libraries; allows linking under conditions while keeping the library copyleft.

Compared to common options: Weaker than GPL-2.0/GPL-3.0 for applications linking the library; stricter than MIT/Apache on the library itself.

Generally allows

  • Commercial use
  • Modification
  • Distribution
  • Private use

Typically requires

  • Provide source for the LGPL library when distributed
  • Allow relinking / follow LGPL library terms
  • Include notices

Watch-outs

  • Closing the library without meeting LGPL terms

How teams usually use it

  1. Verify whether the project is LGPL-2.1-only or or-later.
  2. Static linking and proprietary packaging often need a careful compliance review.
Official & reference sources

Orientation only — not legal advice. Always verify the repository LICENSE file, notices, and dependency terms, and obtain counsel for commercial distribution decisions.

Projects declared under LGPL-2.1.

Inspect repositories, stacks, activity, and alternatives across catalog projects that declare LGPL-2.1.

6 projects connectedAlways verify the repository LICENSE file and obtain legal advice when needed.
FreeCAD
LGPL-2.1

Official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler.

Content & CollaborationOpen-source projects grouped in this category for discovery and comparison.3 projects#C++Projects tagged with this topic in the verified catalog.1 projectfreecadProjects tagged with this topic in the verified catalog.1 projectengineeringProjects tagged with this topic in the verified catalog.1 projectAshbyProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree32.1K5.8K28 hours ago
Alternatives toAshbyAshbyProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative+2
LanguageTool
LGPL-2.1

Style and Grammar Checker for 25+ Languages

Content & CollaborationOpen-source projects grouped in this category for discovery and comparison.3 projects#JavaProjects tagged with this topic in the verified catalog.2 projectsGithub ActionsProjects tagged with this topic in the verified catalog.3 projectsCSSProjects tagged with this topic in the verified catalog.3 projectsGrammarlyProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree14.7K1.5K29 hours ago
Alternatives toGrammarlyGrammarlyProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative
Opengrep
LGPL-2.1

🔎 Static code analysis engine to find security issues in code.

Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.2 projects#OCamlProjects tagged with this topic in the verified catalog.1 projectGithub ActionsProjects tagged with this topic in the verified catalog.3 projectsJavaScriptProjects tagged with this topic in the verified catalog.3 projectsSelf-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.2 self-hosted optionsCustomer.ioProprietary customer engagement and messaging platform.1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree2.8K22931 hours ago
Alternatives toCustomer.ioCustomer.ioProprietary customer engagement and messaging platform.1 alternative+1
Horilla
LGPL-2.1

Horilla is a free and open source HR and CRM software.

Business SoftwareOpen-source projects grouped in this category for discovery and comparison.1 project#HTMLProjects tagged with this topic in the verified catalog.1 projectJavaScriptProjects tagged with this topic in the verified catalog.3 projectsNodeJSProjects tagged with this topic in the verified catalog.2 projectsSelf-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.2 self-hosted optionsBreezy HRProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree1.3K84927 hours ago
Alternatives toBreezy HRBreezy HRProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative+3
XWiki
LGPL-2.1

The XWiki platform

Content & CollaborationOpen-source projects grouped in this category for discovery and comparison.3 projects#JavaProjects tagged with this topic in the verified catalog.2 projectsGithub ActionsProjects tagged with this topic in the verified catalog.3 projectsJavaScriptProjects tagged with this topic in the verified catalog.3 projectsNotionAll-in-one proprietary workspace for notes, docs, and databases.1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree1.3K65126 hours ago
Alternatives toNotionNotionAll-in-one proprietary workspace for notes, docs, and databases.1 alternative+4
DSS Demonstrations
European UnionLGPL-2.1

DSS Demonstrations is the demonstration repository for project DSS.

Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.2 projects#windowsProjects tagged with this topic in the verified catalog.1 projecte-signatureProjects tagged with this topic in the verified catalog.1 projectWindowsDocumented runtime or deployment platform for this open-source project.1 projectAshbyProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative
EUEU - Code Europa EUFederated from EU - Code Europa EU (European Union) in the EU Open Source Solutions Catalogue. Software type: Standalone/Other.Stable · E SignatureStableStableMarked Stable in the EU OSS Catalogue: considered ready for production use by the publishing public administration.EU OSS Catalogue maturity
373/100Vitality 73/100Healthy activity. The EU OSS Catalogue vitality index (0–100) is an AGID-compatible score of recent repository activity—commits, releases, and contributor signals—not a quality or security rating.EU OSS Catalogue · AGID-compatibleActivity unavailable
Alternatives toAshbyAshbyProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative+2
Showing 6 of 6