I started using FeatherPad on a low-end Linux machine, and was impressed with its speed, stability, and a feature set with just enough to make it practical as my main text editor. (Search of course, but also syntax highlighting, sorting lines within a file, and quickly switching word-wrap on and off.) It’s more stable (and faster!) than Gnome Text Editor and more capable than Gedit. I’ve since set it as my default on my main Linux system.

Online at FeatherPad.