FileZilla

FileZilla is a powerful FTP-client for Windows NT4, 2000 and XP. It has been designed for ease of use and with support for as many features as possible, while still being fast and reliable.

The program offers support for firewalls and proxy connections as well as SSL and Kerberos GSS security.

Features:

* Easy to use
* Multilingual (English, German, French, Japanese, just to name a few)
* Strong encryption support using SFTP over SSH and FTP over SSL/TLS
* Supports transfer resuming and files larger than 4 GiB
* Site Manager
* Queue support
* Proxy support
* Speed limits
* MODE Z transfer compressing


http://filezilla-project.org/

Thunderbird

Thunderbird is a great email client from the same people who brought you the Firefox browser.

Thunderbird gives you IMAP/POP support, a built-in RSS reader, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.
Full-Featured Email
Junk Mail Filters
Anti-Phishing Protection
Advanced Security
Automatic Updates

http://www.mozilla.com/en-US/thunderbird/

CCleaner

CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware! :)
http://www.ccleaner.com/