Protopack JS is set of UI components for Prototype JS framework. It is open source and publishes under the MIT license.
Stopwatch is a tiny Chrome application helps you to keep the time for your tasks or projects. It uses Chrome storage so you never lose your spent time even on unwanted program termination. It's totally cool!
WYUI Compressor is a Windows UI for Yahoo!'s YUI Compressor. It minifies your JS/CSS files in just one click rather than using complicated command line. There are also some online versions of Yahoo!'s YUI Compressor but the benefit of a Windows based application is that you don't have to upload your source codes on to the web.
Want to name your files with a particular pattern? Batch Rename is a small Windows program used to rename a group of files or directories. It is smart and easy to use.