My favorite packages for Ubuntu/Fedora

Packages for Ubuntu
(dpkg --get-selections > mylist: backup all the packages you've installed, and use awk to output the first column)
sudo dpkg --set-selections < mylist && apt-get dselect-upgrade

====
some plugins for fedora:
yum-utils
nautilus-open-terminal
bash-completion
====
Wine
wine-doors

libdvdcss2
*w32codecs
ffmpeg( following packages are not needed:
sudo
apt-get purge libical0 libflash0c2 mplayer-skins libsvga1
python-mpdclient libamrnb3 libamrwb3 libenca0 libggi2 libgii1
libgii1-target-x sshfs)
ubuntu-restricted-extras (this one can solve mp3 and other third party stuff)

For Totem (gstreamer)
gstreamer-ffmpeg and ffmpeg is essential.
other plugins for gstreamer will be helpful.

smplayer(mplayer)

nautilus-open -terminal

--gnome-do

guake/yakuake
terminator

--kmod-ndiswrapper (from fedora 11, run such command "su -c 'yum -y install kmod-ndiswrapper' ", after RPM Fusion is installed.

*stardict

vnc4server
vnc4viewer

opera/epiphany

emesene

gedit-plugins(a lot of plugins for c/c++/java/latex etc.)

lyx(for latex and other formal document writing)
latex-beamer

lynx(command-line web browser)

*vim

*texmaker(+texlive-latex)

Chinese

ndiswrapper (-ma to install driver)

samba(smbpasswd -a user, here this user must exist in the system users database)

=================================
(Extra)

build-essential
gcj
sun-java6-jdk(jfree char lib)
*python (docs,matplotlib,numpy)

eclipse(+cdt,pydev)
compat-libstdc++ (for compatibility of some programs using old gcc binaries)

ipython
idle(python-tools in fedora)
numpy
matplotlib
Octave
QToctave

=============
KDE:
adept (update frequency can be set here easily)
======================
Good application:

mozilla-acroread acroread-plugins

inkscape

audacity
smplayer

miro

vlc

realplay 11
*azureus(vuze, should install from website downloading)

conky
devhelp
okular (pdf reader)

synctree
unison ( make two folders authentic)

easytag

audacity(audio editor)
avidemux(video converter)

kino

gigaget:Thunder( international version (gigaget) with msvcp60.dll)
d4x
gwget
================
patch:

preload
deborphan
powertop
acpitail(to check the temperature, battery)

simple-ccsm (CompizConfig Settings Manager)
ccsm
compiz fusion icon
===============================
For fedora:
smart ( alternative to yumex, which is too slow and costing memory)
rpmfusion-free-package-config-smart

yum-plugin-rpm-warm-cache (to speed up yum)
yum-plugin-remove-with-leaves