POrtableapps.com is a platform which helps you to take ann your favorite application with you where ever you go, and can use it on any PC. It have almost all your favorite applications like portable browsers, chat clients, image editors,Antivirus, office suites, games, etc.
PortableApps.com is an easy to use portable application installation platform which is having an inbuilt Application Store where you can find the application you wanted easily and install them. This platform also have an updater which will check for the latest version of the installed portable applications and you can install them with just a click. This application is having Themes, Colors and Your Personal Menu so that you can customize your own menu.
PortableApps.com lets you carry all your favorite apps on a portable device or cloud drive and use them on any PC. Now you can have your own browser with all your bookmarks and extensions, your full office suite, your photo editor, your whole music collection, your favorite games, your development tools and more
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You can see some of the application below (It is having a big list of portable applications actually, also I have noticed that they will release portable version of an application very soon after the developer released a new version of the software.)
Skype (latest 6.2)
7Zip
GIMP
ClamWin Portable
VLC Media player
Audacity
Open Office
Sumatra PDF Portable
XAMPP
McAfee Stinger
µTorrent
Opera
CamStudio
Firefox
Chrome
Notepad++
Registry cleaners
Portable fonts
Read more about applications available here