- AngularJS (with the almost always necessary library AngularUI) for big projects. jQuery for everything else

- D3.js for graphs and pretty things

===Backend===

- Express.js (Node.js framework) for anything that's more then a tiny api

- Nginx to serve static files and proxy requests to Express.js

- PostgreSQL for my database needs

- Redis for session/temp storage

===Dev===

- Vagrant for development environments

- Chef to help with provisioning vagrant machines and once I become more comfortable, to help with server setup :)