Support for Portable Thunderbird is available from the publisher site.
Short description: Thunderbird supports running from removable drives with minimal reconfiguration. To make life even easier, I've repackaged Thunderbird as a complete, removable drive-friendly email client....
To speed up your downloads we recommend you use a download manager such as 
Smart Bro is a free browser designed carefully to suite the user needs. It is built on the Internet Explorer technology. Smart Bro provides many options including:
1. Tabbed interface.
2. Integrated form filler
3. Popup killer.
Virtual camera and webcam splitter that transforms your computer desktop into a webcam allowing you to do live real-time screencasts through Skype, Messengers, UStream, LiveStream, JustinTv, etc... Plus split your webcam on multiple applications.
A powerful newsreader which lets you easily download all kinds of binary files from the newsgroups on the USENET. Supports yENC (multi-parts with auto-combining), XPAT-search, NZB-files, SSL-connections, RAR-files, posting and much more.
Asoftech Photo Recovery is an easy to use data recovery software available to restore your photos, music and videos from local PC and removable devices. No matter multimedia files have been deleted accidently, or memory card has been formatted.
CloudBerry TweetIE is a Twitter plug-in for IE - BETA. CloudBerry Twitter plug-in for IE helps you to post excerpts from the websites you visit with a click of the button and attach a short URL to the source page.
Search smarter! Save and organize what you find in tabs so you don't have to repeat the same task again and again! Optimal Desktop give you 3 layers of tabs for quick browsing, saving and organizing of your favorite web pages and rss feeds.