SQL Fiddle : A tool for easy online testing and sharing of database problems and their solutions.
SumoPaint : Powerful graphics editor for your web browser and pc
RegPack : RegPack is a packer intended for use on minified Javascript code.
It is mostly suited to small size constraints (1kb, up to 4kb).
EtherPad : Etherpad is an Open Source online editor providing collaborative editing in really real-time powered by Node.js
Splitgraph : Splitgraph is a data management, building and sharing tool inspired by Docker and Git that works on top of PostgreSQL and integrates seamlessly with a...
SQLFormat is a free online formatter for SQL statements.