These are some things I'm working on, or have done in the past.
Tinderizer allows you with the click of a bookmark, to send almost any page on the web to your Kindle for reading at a later time.
fetch is a super simple full text search engine written in Go.
env is a package for the Go programming language to pull variables from the environment. It can pull strings, ints, and floats, and you can optionally specify a default.
Twitter streaming API for Go. Only supports password authentication right now.
compiler is a simple web app to compile less and coffeescript as a service
rack-gist rewrites Github gist script includes to make them load asynchronously, without blocking your page from loading.
goo.gl is a little API endpoint to use Google's URL shortener to shorten URLs in the Twitter iPhone client.
Filter out tweets without links using a simple bookmarklet. Drag it up and go to town.
Filter replies on Twitter so you can see what people normally tweet about.