medit is a free text editor for windows and unix.
Configurable syntax highlighting.
Configurable keyboard accelerators.
Multiplatform – works on unix and windows.
Plugins: can be written in C, Python, or Lua.
Configurable tools available from the main and context menus. They can be written in Python or Lua, or it can be a shell script.
Regular expression search/replace, grep frontend, builtin file selector.