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.