4) WinUtilities Free Edition -

a suite of tools designed to free up disk space and improve system performance.

5) SafeHouse Explorer -

Encryption for Disks and Memory Sticks.

6) Lookout -

Lookout is the easiest way to protect your phone from viruses, hackers, loss and theft.

7) 7-Zip -

7-Zip is a fully featured file compression manager with a nice interface.  7-Zip's greatest strength lies in the unique compression capability it offers through the implementation of its innovative 7z compression format.

8) VMN Toolbox -

VMN Toolbox is a lightweight application that provides you with handy utilities designed to make your life easier in the Web.

9) CleanDesktop -

CleanDesktop is a small portable freeware app which will help you clean up your unused desktop icons in Windows 7 & Vista.

10) EASEUS Todo Backup -

is a perfect backup solution with powerful backup and recovery functions to fulfill all your requirements.

11) Easeus Partition Master Home Edition -

Easeus Partition Manager partitions hard drives. 

12) Asoftech Data Recovery -

Asoftech Data Recovery is a non-destructive file recovery software to help you rescue lost file. No technical required. Just a few clicks you can get back your deleted files, restore disk, rescue lost data and recover formatted partition.

13) Advanced System Care -

A one-stop-shop for cleaning and maintaining your computer for better overall system performance.

14) Smart Defrag -

It's hard to stand out in the crowded field of defraggers, but SmartDefrag is able to do so with an unexpected twist.

15) CCleaner -

CCleaner is the number-one tool for cleaning your Windows PC.