Software that's actually good

This section contains software that maintains a simple minimalist yet reliable code base. I narrowed it down to the most common software the non-coder uses on a daily basis.

Accounting

Ledger

Audio Players

C* Music Player
DeaDBeeF
cplay
moc
mpd - A client/server based music player with console and graphical front-ends.
mpg123 - A console mpg player which doesn’t use auto*hell, or extra libraries.
mpg321
vorbis-tools (Ogg/FLAC) - Command-line tools to play Ogg and FLAC files.

BitTorrent Clients

btpd - The BitTorrent Protocol Daemon

Feed aggregators

newsbeuter

IRC Clients

Irc
acme:SAC
ii - A FIFO based IRC client which is part of the suckless.org project.
ircc - A no-frills, ncurses free, console-based IRC client.
ircrc - An rc-based IRC client similar to ircc. Needs minor modification to run on UNIX.
irssi
sic - Another suckless.org IRC client. Similar to ircc.
quIRC - a lightweight console IRC client

Image Viewers

feh
jpg/gif/bmp/png - Simple programs from Plan 9 to display images in no-frills windows. Included with plan9port.
meh - image viewer using raw XLib, libjpeg, libpng and libgif
page - Plan 9’s image/document viewer program. Included with plan9port.
qiv
sxiv - Simple (or small or suckless) X Image Viewer. Depends on xlib and imlib2.
xli - broken link? Apparently, there’s a copy here: http://ftp.x.org/contrib/applications/ – at your own risk
xzgv

Instant Messaging Clients

bitlbee - A program to translate IM protocols to IRC. You can now IM from your IRC client, and you don’t even need to install anything.
centericq
centerim - A centericq fork.
climm
irssi-xmpp
mcabber - A console jabber client.
ysm

Mail Clients

Mail - A mail client for acme. Included with plan9port.
dmc - A minimalistic approach to a commandline mail client (WIP)
fdm - MDA
heirloom-mailx - A mail client based on the original Berkeley Mail 8.1 with many new features.
mutt
muttator - A Thunderbird extension to make it keyboard friendly and mutt/Vim-like.
nmh

Media Players

mplayer (without GUI) - You know mplayer, but you may not know that it works well without the GUI.

PDF Viewers

Text Editors

acme - Rob Pike’s framing text editor for Plan 9. Included in plan9port.
ired (Minimalist hexadecimal editor and bindiffer for p9, w32 and *nix)
nvi - A small, multiple file vi-alike.
sam - An editor by [Rob Pike][rob] with inspiration from ed.
traditional vi - A fixed version of the original vi.
vim (With the GUI, use :set go+=c to kill popup dialogs)
wily - An acme clone for POSIX.
ed - ED IS THE STANDARD TEXT EDITOR!