Mind42 : Collaborative mind mapping in your browser
EtherPad : Etherpad is an Open Source online editor providing collaborative editing in really real-time powered by Node.js
regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
Vector Magic : Easily Convert Bitmap Images To Clean Vector Art
Automatically convert bitmap images like JPEGs, GIFs and PNGs to the crisp, clean, scalable vector ar...
RegPack : RegPack is a packer intended for use on minified Javascript code.
It is mostly suited to small size constraints (1kb, up to 4kb).
RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).