Cypress
Cypress.io · Testing & QA
End-to-end and component testing framework that runs tests inside the browser with an interactive runner, paired with the commercial Cypress Cloud
MITOpen sourceFreeLocalNov 2, 2026
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draw.io
draw.io AG / JGraph Ltd · Design & prototyping
Free diagramming editor (formerly diagrams.net) for flowcharts, network, UML and architecture diagrams, available as web app, desktop app and integrations
Apache-2.0FreeOpen sourceLocalSelf-hostedNov 2, 2026
Observable
Observable, Inc. · Notebooks & interactive computing
JavaScript data notebooks and the open-source Observable Framework static-site generator for data apps, from the maintainers of D3 and Plot
ISCFreemiumPaidLocalNov 2, 2026
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