Ncurses based hex editor with vi/vim-like interface. Features include large file support, search highlight, multiple undo/redo, visual select, cut/paste, blob coloring, file tabs, and much more.
Simple text is a text editor written in c but to have the ability to use different plugins for extended such as a plugin for syntax highlighting or multiple tabs for editing but still keep it nice and simple for everyday use
Retab is a command line utility that allows you to reformat ASCII text files so that the tab characters represent a different number of characters. It can reformat text for new tab size, convert all tabs into spaces or it can convert spaces into tabs.