SQL Fiddle : A tool for easy online testing and sharing of database problems and their solutions.
metaflop : Metaflop is an easy to use web application for modulating your own fonts. Metaflop uses Metafont, which allows you to easily customize a font within t...
Use The Index, Luke! : A tutorial covering SQL indexing and SQL tuning for developers: avoiding unnecessary details about database internals.
SQL indexing is the most effect...
DOM Storage Query Language : DOM Storage Query Language (DomSQL) is an SQL inspired interface for DOM Storage (or Web Storage as defined in the W3C working draft).
EtherPad : Etherpad is an Open Source online editor providing collaborative editing in really real-time powered by Node.js
SQLFormat is a free online formatter for SQL statements.