CouchDB : Apache CouchDB™ is a database
that uses JSON for documents,
JavaScript for MapReduce indexes,
and regular HTTP for its API
Typst : Typst is a new markup-based typesetting system that is designed to be as powerful as LaTeX while being much easier to learn and use. Typst has:
Built-...
CyberChef : A simple, intuitive web app for analysing and decoding data without having to deal with complex tools or programming languages. CyberChef encourages b...
Kroki : Convert plain text diagrams to images !
Kroki provides a unified API with support for BlockDiag (BlockDiag, SeqDiag, ActDiag, NwDiag), C4 (with PlantU...
Open Paperless : Scan, index, and archive all of your paper documents. Open Paperless is a re-think of the user interface and user experience for Mayan EDMS. The goal ...
If you need to convert files from one markup format into another, pandoc is your swiss-army knife.