Setedit is a text editor specially designed for programmers. It has a nice interface with mouse support, menus and windows (text mode). The editor is a very good choice for people with DOS background, especially people accustomed to Worstar and Borland editors. The editor has overlapped windows so you can see more than one file at the same time, configurable syntax highlighting, macros, rectangular selection, block indentation, as well as customizable keyboard shortcuts and menus.
SLglade is a S-Lang module that provides S-Lang bindings for the libglade library. Used in conjunction with SLgtk, it allows users to design a GUI with Glade (a GTK+ user interface builder), save the interface description in a Glade XML file, and then generate the S-Lang script's graphical interface directly from the XML at runtime.