mitchell / Textadept (http://caladbolg.net/textadept)

Textadept is a fast, minimalist, and ridiculously extensible text editor for Linux, Mac OSX, and Windows. The C++ core will always be less than 2000 lines of code (excluding comments and blank lines) and contains the bare framework for a text editor. More than half of the C++ base is the Lua extension, and nearly everything in Textadept is controlled by Lua, making the editor's extensibility almost limitless.

$ hg clone http://bitbucket.org/mitchell/textadept/

$ hg clone ssh://hg@bitbucket.org/mitchell/textadept/