Flashplayer
http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash

compress/decompress tool
rar http://www.rarlab.com/download.htm trial only
7-zip http://7-zip.org/download.html freeware, my choice

QQ for Linux Chat ware.
http://lumaqq.linuxxir.org most popular
http://sourceforge.net/projects/evaq for kde
http://sourceforge.net/projects/openq work as plugin for Pidgin

multimedia player
Realplayer http://www.real.com/linux/
mp3 player www.xmms.org not necessary
DVD/VCD player http://sourceforge.net/projects/kaffeine
mplayer http://www.mplayerhq.hu
after install Fedora 8 repository RPM from: http://rpm.livna.org/livna-release-8.rpm
it can be installed by a simple command in fedora:
yum -y install mplayer
Running Transaction
Installing: libdvdnav ####################### [ 1/12]
Installing: libdca ####################### [ 2/12]
Installing: lirc ####################### [ 3/12]
Installing: aalib ####################### [ 4/12]
Installing: libXvMC ####################### [ 5/12]
Installing: xvidcore ####################### [ 6/12]
Installing: libdvdread ####################### [ 7/12]
Installing: fribidi ####################### [ 8/12]
Installing: libcaca ####################### [ 9/12]
Installing: enca ####################### [10/12]
Installing: libmpcdec ####################### [11/12]
Installing: mplayer ####################### [12/12]
Installed: mplayer.i386 0:1.0-0.88.rc2.lvn8

web browser
firefox builtin
opera http://www.opera.com

picture view and process
www.xnview.com freeware viewer
www.gimp.org freeware editor

Chinese input
http://download.linuxsir.org/fcitx

bit torrent & download tool
BitTorrent http://www.bittorrent.com v4.4 builtin in Fedora 8

office (killer app that kills ms office)
http://www.openoffice.org/ builtin in Fedora 8