Name:BleachBit (Free) 
URL:https://www.bleachbit.org/
Utility:This free tool - 

• Frees cache, deletes cookies, clears internet history, shreds temporary files, deletes logs and discard junk files
• Wipes clean thousands of applications including Firefox, Internet Explorer, Adobe Flash, Google Chrome, Opera, Safari and much more. 
• Shreds files to prevent recovery, wipes free disk space to hide traces of files deleted by other applications, and vacuums Firefox to make it faster
• Guards privacy and quickly frees disk space

Special Features:

• Cross platform
• Free and open source