Free
Programming
Scratch is a free programming language and online community where you can create your own interactive stories, games, and animations.
Game Development
GDevelop is a free, fast, easy, open-source game engine. Learn 2D, 3D or multiplayer game development with our tutorials. Publish everywhere: iOS, Android, Steam… Use AI to learn…
Data Extraction
Tabula is a free tool for extracting data from PDF files into CSV and Excel files.
Astronomy
The SIMBAD astronomical database provides basic data, cross-identifications, bibliography and measurements for astronomical objects outside the solar system.