famfamfam.com: Silk Icons – “Silk” is a smooth, free icon set, containing over 700 16-by-16 pixel icons in strokably-soft PNG format.
Read the Docs – Read the Docs hosts documentation, making it fully searchable and easy to find. You can import your docs using any major version control system, including Mercurial, Git, Subversion, and Bazaar. We support webhooks so your docs get built when you commit code. There’s also support for versioning so you can build docs from tags and branches of your code in your repository.
Glue – Automatic Sprite (PNG+CSS) creation. Support for multi-sprite projects. Automatic crop of unnecessary transparent borders around source images. Configurable paddings per image, sprite or project. Optional .less output format. Automatic sprite images post-processing using OptiPNG. Sprite- and Project-level configuration via static config files. Configurable cache busting for sprite images.
scrollorama – The jQuery plugin for doing cool scrolly stuff.
FreshBooks – The fastest way to track time, organise expenses and invoice clients.