Damit sind Werkzeuge gemeint, die sich in erster Linie im Terminal bedienen lassen. Im weitere Sinne nicht nur command line (cli) sondern terminal user interface (tui).
term
dtach, a program that emulates the detach feature of screen
qataki, a command line Identi.ca/StatusNet/Twitter client
rsstool, is a tool to read, parse, merge, and write RSS and Atom feeds.
seren, a VoIP program based on the Opus codec that allows you to create a voice conference from the terminal, with up to 10 participants, without having to register accounts, exchange emails, or add people to contact lists.
twidge, a tool for interacting with microblogging sites such as Twitter and identi.ca.