Antivirus 

AVG Antivirus Free

Avast Free Antivirus

Microsoft Security Essentials

Anti-Malware & Anti-Spyware

Malwarebytes

Spybot Search & Destroy

Lookout Mobile

PC Information and Cleanup  

CCleaner

Crucial Memory Scanner

Internet Speed Test

Free PDF Creation and Reader Software

CutePDF

Primo PDF

Adobe Reader DC

Free Photo Editors

Irfanview