Interesting

bashmarks     Directory bookmarks for the shell 
              https://github.com/huyng/bashmarks

csvtool       manipulate CSV files from shell scripts

dateutils     tools for manipulating dates and times
              http://hroptatyr.github.com/dateutils/

fim           FIM aims to be a highly customizable and scriptable image 
              viewer targeted at users who are confortable with software 
              like the Vim text editor or the Mutt mail user agent. 

gqview        good quality but lightweight image view

ifdown/ifup   Stop/start a network interface 

jsawk         Jsawk is like awk, but for JSON.
              https://github.com/micha/jsawk

jshon         command-line json file manipulator
              http://kmkeen.com/jshon/

launchy       spotlight clone. Activate using Ctrl-Space

md2man        markdown docs to man pages

moreutils     collection of the unix tools that nobody thought to write
              combine ifne lckdo mspipe parallel pee sponge ts vidir + others

              sponge is excellent because you can wirte a file in-place. Eg
              sed "s/root/toor/" /etc/passwd | grep -v joey | sponge /etc/passwd


nl            Number lines and write files

nmon          performance monitor

pgrep/pkill   Stop processes from running using names rather than PIDs

pinta         Simple paint program

recordmydesktop/screetoaster 
              records your desktop

ronn          markdown to man page generator.
              Debian package: ruby-ronn

shellinabox   put a terminal in a browser http://code.google.com/p/shellinabox/

sunflower-fm  dual-pane file manager

sxiv          v.simple image viewer, depending only on imlib2
              https://github.com/muennich/sxiv

tmux          terminal multiplexer, a la screen

tpp           console presentation

twidge        twitter on the command-line

unoconv       convert between any doc format supported by OpenOffice
              http://dag.wieers.com/home-made/unoconv/

wcalc         a natural-expression command-line calculator

zim           file-based wiki apps with heirarchical structure

zssh          interactive file transfers over ssh

Author:  Mark Carter
Created: 11-Mar-2011
Updated: 05-May-2012