Official site directory
Name, domain and purpose together: identify the organization first, then open its website.
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Official site directory
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- OpenRefineopenrefine.orgOpenRefine offers facets, clustering and reconciliation for messy data. Project data is stored locally, but reconciliation, URL fetching and other connected operations can transmit information to external services. Review cleaning decisions rather than accepting them blindly.Development & dataIdentity verified
- OpenSCADopenscad.orgOpenSCAD is a solid 3D CAD tool that reads scripts describing objects. It suits users who want control through parameters and modelling steps, rather than a primarily interactive sculpting or animation workflow.Design & creative toolsIdentity verified
- OpenStaxopenstax.orgOpenStax is a nonprofit education initiative of Rice University offering peer-reviewed textbooks. Use its library for online reading or PDF downloads; check print options and the licence of each work separately.Schools & learningIdentity verified
- calibrecalibre-ebook.comcalibre helps organise an existing ebook collection, read files and edit books. Its website connects software information, downloads and help. Treat it as a library tool, not as a shop that supplies permission to read or redistribute a work.Culture & readingIdentity verified
- PubMedpubmed.ncbi.nlm.nih.govPubMed is an entry point for searching biomedical and life-science literature information. A search record, an abstract and access to full text are different things; check the relevant author, journal or provider for the document and its terms.Research & educationIdentity verified
- LibreOfficewww.libreoffice.orgLibreOffice is a community-driven open-source office suite project. Its main site is an entry point for project information, downloads and support resources. Test compatibility with the document formats and workflows that matter to you.Office & productivityIdentity verified
- QGISqgis.orgQGIS offers tools for organising locations, boundaries and raster material into maps. It is not a ready-made source of data for every region. Data quality, coordinate systems and permission to publish require their own checks.Development & dataIdentity verified
- Sweet Home 3Dwww.sweethome3d.comSweet Home 3D supports home floor plans, furniture arrangement and 3D previews. Its site links to downloads, online use and learning resources. Check the free edition, platform-specific versions and asset rights separately.Design & creative toolsIdentity verified
- OpenLearnwww.open.eduOpenLearn is provided by The Open University and brings together free short courses, articles and interactive learning. Participation statements and badges on some courses can document study, but they do not carry formal qualification credit.Schools & learningIdentity verified
- Project Gutenbergwww.gutenberg.orgProject Gutenberg provides an entry point to ebooks and information about the project. Check a work's author, edition, file format and accompanying usage notice; the platform name alone is not a worldwide reuse licence for every file.Culture & readingIdentity verified
- Zoterowww.zotero.orgZotero helps organize research materials and prepare citations. Its website describes collections, tags, citation tools and optional synchronization; university library guides can provide additional learning support. Check imported reference details, and assess the original material rather than treating a well-formatted citation as proof of reliability.Research & educationIdentity verified
- Project Jupyterjupyter.orgStart at Project Jupyter to choose Notebook or JupyterLab for computational documents and find installation guidance. The project site does not supply your data, dependencies or a guaranteed continuously hosted computing service.Development & dataIdentity verified
- darktablewww.darktable.orgdarktable combines photographic file management with RAW development. Its site connects features, installation resources and camera-support information. Open-source status alone does not establish compatibility with every camera or workflow.Design & creative toolsIdentity verified
- PhETphet.colorado.eduThe PhET Interactive Simulations project at the University of Colorado Boulder offers resources for exploring science and mathematics. Choose a topic, vary a condition and inspect feedback. Regular simulations, redistribution and products such as PhET Studio have distinct use conditions.Schools & learningIdentity verified
- Internet Archivearchive.orgInternet Archive is an entry point to digital collections and web history, described by its help centre as a nonprofit preserving digital cultural artifacts. The University of Maryland Libraries links directly to the service and describes its collections. Assess access and reuse conditions item by item; permissions for one institution's collection do not cover the whole platform.Culture & readingIdentity verified
- NISTwww.nist.govA scientific and technical agency within the U.S. Department of Commerce, working in measurement science, standards and technology. Check original documents and distinguish their scope from third-party claims.Research & educationIdentity verified
- Rwww.r-project.orgThe R project website connects readers to statistical software, manuals and CRAN downloads. R is a language and computing environment; packages and analytical methods need separate evaluation. A plot or test result alone does not establish a reliable conclusion.Development & dataIdentity verified
- Kritakrita.orgUse Krita's website to find painting software, learning material and community resources. Its focus is digital painting. The product, documentation site and artists' displayed work have different roles; seeing artwork on the site is not permission to reuse it.Design & creative toolsIdentity verified
Peking Universitywww.pku.edu.cnCross-check Peking University’s website through the education ministry listing and the university’s Chinese and English portals. Departmental and transaction-specific pages remain separate.Schools & learningIdentity verified- NASAwww.nasa.govA U.S. government agency working in aeronautics, space and science. Check its website, understand its purpose and find traceable original material.Research & educationIdentity verified
- Pythonwww.python.orgPython's main website introduces the language project and connects its downloads, documentation and community information. Use it to identify the language's own resources before following a third-party distribution or package.Development & dataIdentity verified
- FreeCADwww.freecad.orgFreeCAD is a starting point for dimension-driven design of parts, furniture or 3D-printing models. Its approach centres on parameters and model history. Producing a model is not proof of structural strength, manufacturability or engineering safety.Design & creative toolsIdentity verified
- GIMPwww.gimp.orgGIMP's main site introduces the cross-platform image editor and links to downloads, documentation and project participation. Start there to identify the software and its help resources before choosing task-specific plugins or tutorials.Design & creative toolsIdentity verified
- Blenderwww.blender.orgBlender is a community-developed 3D creation project coordinated by the Blender Foundation. Its main website leads to project information, software and support. Distinguish the software from Blender Studio's subscription-based production knowledge and assets, and check the conditions for any material you intend to reuse.Design & creative toolsIdentity verified