Here is a list of apps I use.

Windows 7:

7-Zip
Adobe Illustrator CS5
Adobe Photoshop CS5 Extended
CCleaner
FileZilla
Google Chrome
Google Pinyin IME v1.2.33.79
Microsoft Security Essentials
Microsoft Visual Studio 2010
Mozilla Firefox
Notepad2
Paint.NET
PPS
PPTV
Process Explorer
QQ International
Rosetta Stone v3.45 with fr_FR Level 1/2/3
Sandboxie v3.46
Speccy
SPlayer
SumatraPDF
Thunder
UltraISO v.9.3.6.2750
uTorrent
WanDouJia
WinDjView
Wolfram Mathematica 7
WPS
YunDuan

GNU/Linux: # Ubuntu 10.04 LTS or later

sudo apt-get install mplayer w64codecs libdvdcss2 gnome-colors shiki-colors arc-colors compiz compizconfig-settings-manager simple-ccsm
sudo apt-get install ubuntu-tweak ailurus p7zip p7zip-rar p7zip-full nautilus-open-terminal nautilus-gksu gufw ttf-wqy-microhei ubiquity-frontend-gtk gimp
sudo apt-get install poppler-data google-chrome-unstable tor tor-geoipdb vidalia prism ibus-pinyin googleearth rtorrent
sudo apt-get install build-essential python-setuptools python-dev mercurial bison gcc libc6-dev ed gawk make auto-apt checkinstall vim idle-python2.6 libssl-dev geany indent glade manpages-dev manpages-posix-dev manpages-posix exuberant-ctags libgmp3-dev libncurses5-dev libqt3-mt-dev subversion git-core


Android 2.3: # MIUI ROM v1.7.15 or later

Advanced Task Manager
Camera360
ConnectBot
Doodle Jump
douban.fm
Fetion
Fruit Ninja
Gallery 3D
Goggles
Google Sky Map
iReader
Maps
MobileQQ
MoboPlayer
OfficeSuite Pro
Opera Mobile
Opera Mini
Root Explorer
SogouInput
SSHTunnel
Street View
Super Compass
UC Browser
WanDouJia
WeiXin
Wolfram Alpha

WebApps:

CloudFlare
douban
Facebook
github
Google (and many things from it)
ifttt
Quora
RenRen
Twitter
WebQQ
Weibo
WordPress