Mind42 : Collaborative mind mapping in your browser
Mockingbird : Mockingbird is an online tool that makes it easy for you to create, link together, preview, and share mockups of your website or application.
Query Mongo : Convert MySQL Queries to MongoDB Syntax
RegExr : RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
RegPack : RegPack is a packer intended for use on minified Javascript code.
It is mostly suited to small size constraints (1kb, up to 4kb).
