I just released the first version of CodeSlayer! It is a lightweight source code editor that boasts a clean interface but powerful features. It is written in C using the GTK+ toolkit.
I think right now the target audience for CodeSlayer is anyone that does not need the features of a full blown IDE, but still wants a text editor that is geared towards writing code. At the core I always want CodeSlayer to be light and language neutral (aside from what GtkSourceView brings). And I think there is a ton of functionality that can be done with that in mind that other editors have not included. An example of this with CodeSlayer is the groups manager, which allows you to group file system mount points (called projects). This keeps things organized and can be easily searched. In addition you can have as many groups as you want, with an easy way to flip between them. And CodeSlayer will even keep track of the tabs you have opened as you flip between the groups.
Then past the core functionality the goal is to make it easy for anyone to write a quick plugin. I am finishing up the plugin system right now so we will have a real nice way to start in with the language specific features. But, again, I never want any language specific feature to bleed into the core so that CodeSlayer always feels light.
Right now I spend all of my free coding time working on CodeSlayer. Its something that I enjoy working on and I hope other people find it useful!
The website is http://codeslayer.org and has all the information about how to install CodeSlayer.