Arora
Chrome
Chromium (opensource version of Chrome)
Dillo
Elinks (cli)
Epiphany
Firefox
Flock
Iceweasel (based on Firefox)
Links2 (cli)
Lynx (cli)
Midori (light)
Opera (closedsource,)
Seamonkey
SRware Iron
Surf
Swiftfox (based on Firefox)
Swiftweasel (based on Firefox)
Uzbl
w3m (cli)
Claws Mail
Eudora
Evolution
Icedove (based on Thunderbird)
Mutt (cli)
Pine (cli)
Seamonkey (includes browser)
Simple Mail add-on for Firefox
Spicebird
Sylpheed
Thunderbird
Urlview (cli)
Liferea (slow)
Newsbeuter (cli)
Nrss (console)
RSSowl
RSS plugin for Claws Mail
Sage add-on for Firefox
Snownews (cli)
Voracious
BitTorrent
Btdownloadcurses (cli)
Ctorrent (cli)
Deluge
Ktorrent
Rtorrent (cli)
Transmission
Hootsuite
Pino
Twidge (cli)
Skype
TS Client / Teamspeak
aMSN
attym
Bitlbee
Centericq (cli)
CenterIM (cli)
Emesene
Empathy
Finch (cli)
Gajim
IM
naim
Pidgin
psi
Skype
Bashpodder
Gpodder
Hpodder (cli)
Amaya
Aptana Studio
Bluefish
Komodo Edit
Kompozer (wysiwyg)
NetBeans
Quanta Plus
Iwconfig
Network-Manager
Wicd
Gitso (front-end for TightVNC)
LogMeIn (cross-platform)
NoMachien (cross-platform)
Rdesktop (linux only)
Teamviewer (cross-platform)
TightVNC / Tightvncserver / Xtightvncviewer (cross-platform)
BasketNotes
Fltdj
gjots2
Gnote
Hyperlist
KeepNote
mboy
Notecase
NoteCase
RedNoteBook
TiddlyWiki
Tomboy
Tuxcards
Tux_todo
Xpad
ZIM
OpenOffice.org
KOffice
Siag office
Gcalctool
Qalculate-gtk
Speedcrunch
Xcalc
Artha
Dict (cli)
Goldendict
Sdcv (cli for Stardict)
Stardict
Xfce dictionary
Gorganizer
IceOwl
Osmo
Sunbird
ePDFView
Evince
Evince-lite
FBReader
Foxit
green
gv
Okular
Pdf2text
Xpdf
zathura
Alchemy
Blender (3d creation)
Cinepaint
Dcraw
Digikam
flphoto
Fotoxx
Gimp
GrafX2
Graphicsmagick (similar to imagemagick, project goal is to be more stable)
Hugin (Panorama CreationTool)
i.Mage
ImageMagick (cli)
Mtpaint
MyPaint
Nathive
netpbm
Pinta
RawStudio
Tuxpaint
Ufraw
XaraLX
Xara Xtreme
Figurine
Inkscape
Sodipodi
Tgif
xfig
Agave
Gcolor2
gifsicle (cli)
giftrans (cli)
icobundle (cli)
Phatch
photocrop
pngcrush (cli)
xtopng
comical
Comix
Digikam
Feh
geeqie
GPicView
GQview/geeqie
Gthumb
GTKam
gtksee
Gwenview
Mirage
picaxo
Ristretto
Shotwell
Viewnior
xfi
xzgv (console)
Aqualung
aTunes
Audacious
Banshee
Clementine
Cplay (cli)
Deadbeef
Decibel Audio Player
Exaile
Gmusicbrowser
Goggles
Guayadeque
Herrie (cli)
LXMusic
MoC (cli)
Mocp
MPD
Ncmpcpp (cli)
Performous
Pragha
QMMP
QuodLibet
Rythymbox
Sonata
Songbird
timidity++ (console or
GUI) (Note: For best Karaoke midi support (which can be used with abc2midi), use the xaw/lesstif interface)
Vitunes (cli)
Xfmedia
XMMS
Ardour
Audacity
ecawave
jokosher
mhwavedit
rezound
snd (cli and gtk)
sweep
Traverso
Easytag
Ex Falso
Puddletag
Tagtool
Brasero
Grafburn
K3b
Wodim (cli)
Xcdroast
Xfburn
Abcde (cli)
Asunder
Grip
Jack
RipperX
Rubyripper
Sound Juicer
dvd-author (cli)
dvdstyler
gopchop
mjpegtools (cli)
mpgtx (cli)
-
vamps (cli)
vobcopy
vstrip
Avidemux
Cinelerra CV
LiVES
PiTiVi
flxine
GNOME-MPlayer
Miro
MPlayer
-
Parole
SMPlayer
Totem
VLC
AlsaEqual
aumix (console or gui)
rexima
umix (console)
atool (cli)
bsdtar (cli)
File-Roller
p7zip (cli)
Squeeze
Xarchiver
bash_commander (console)
Dolphin
EmelFM2
gentoo
Gnome-commander
MC (cli)
mfm
Nautilus
pathfinder
PCManFM
qtfm
Rox-Filer
-
Thunar
Vifm (cli)
Worker
Xfe
Beagle
Catfish
Gnome Search Tool
Recoll
Searchmonkey
Hardinfo
Hwinfo (cli)
Inxi (cli)
Lshw (cli)
saidar
saidar
Sysinfo
sysstat
sysstat
x86info
xosview
xsysinfo
Conky
Gnome System Monitor
Htop (cli)
Lxtask
Pcstats (cli)
procmeter3
ps (cli)
Sensors (cli)
top (cli)
Xfce4-taskmanager
Arno's IP Tables
Firehol
Firestarter
Gufw
Adeskbar
Adesklauncher
Adeskmenu
Bmpanel
Bmpanel2
dmenu
Lxpanel
Marchobmenu
menu
Tint2
Xfce4-panel
dialog (console)
gtkdialog
gxmessage
xdialog
zenity
Bashrun (application launcher)
Gnome-Do (application launcher)
gtk-chtheme
I3lock (screen locker)
Nitrogen (background browser)
Pytyler (tiling window manager)
Slock (screen locker)
Specto (mail/website change notifier)
Xautolock (program launcher for idle X sessions)
Xscreensaver (screen saver)
foomatic-gui
gtklp
system-config-printer
xpp
Baobab (disk usage analyzer)
Boot Up Manager (BUM)
Build-essential (essential packages for building Debian packages)
Deborphan / Orphanage (delete orphaned files)
Gdebi (deb installer)
Gparted (graphical partition editor)
Gui-apt-key (Key Manager for APT)
-
Rcconf (services configuration tool)
sysv-rc-conf (manage services, cli)
Unetbootin (create bootable Live USB drives)
Usermode (user and group management)
Wajig (front-end for apt)
BleachBit (junk cleaner)
keepassx
MyPasswordSafe
pwsafe (cli)
Seahorse (front-end for gnupg)
Secure-delete (secure file-deletion)
Truecrypt (file encryption)
Wipe (secure file deletion)
autocutsel
Caffeine (temporarily disable screensaver/autolock)
Clipman (clipboard manager)
Glipper (clipboard manager)
lxsplit (cli)
Métamorphose ( File and folder renamer)
Parcellite (clipboard manager)
workrave
xclipboard
xwrits
sylpheed e-mail client. It's lighter weight than Claws which is a fork that's added many other features. You can also add features with slypheed, but it's taken the approach of shelling out to other programs for added functionality similar to classic Unix philosophy of do one thing well. It has better security, since it limits scripts that can be run and tries to keep to text based viewing. It works better cross-platform, so you can use the same e-mail client on multiple operating systems.