NoTrax - description from Softdepia.com:
NoTrax is the Secure Tabbed Web Browser that leaves NO RECORD of your Internet activity on your PC. No writing to Registry during browser sessions. No index.dat worries. No writing to Recycle Bin and app. logs are not created. It erases Session files,Cookies and Cache using secure deletion methods during and on exit from Browser Sessions. Cache is held and erased in memory and is encrypted.Does not run Spyware, JavaSccript, or ActiveX.
NoTrax is a "Free to try" program. You can download and try it for an evaluation period.