Codenizer is very easy to use tool for analysis of PHP scripts - it will save you lot of time you would spend debugging otherwise. This is plugin to enable you to use it from within Eclipse.
MalwareBytes
Removes even the most stubborn malware.
Spam Bully
Spam Bully can eliminate up to 99% of spam.
AVG Anti-Virus
Well-known free antivirus protection software.
WinZip
WinZip is the world's #1 zip utility.
Download Manager
Free download manager & internet accelerator.