Useful Tools

Most of these otion have a free or limited version.

Anti-spyware/Anti-virus
Avast
AVG
Bitdefender
Malwarebytes
Norton
Kaspersky
Panda Security
Avira
McAfee

Essential Items
Defraggler
Smart Defrag
BleachBit
Recuva
Ubackup
Perfect Backup
Password Generator
OneDrive
Revo Uninstaller

File compression
Zip
Winrar
Winzip
7-Zip
Stuffit
Archiver

Graphics/Clipart
Gimp
Paint.net
Canva
Pixabay
Freepik
Clipart.com
Clip Safari
Pngtree
FreeImages

Video Viewers
VLC
Quicktime
Divx

Productivity Software
Office Suite
Apple iWork
Apache OpenOffice
Libre Office
FreeOffice
OnlyOffice
Audacity
Acrobat Reader
ClipClip

Website Editors
Coffeecup HTML
Blue Griffon
Sublime Text
Open Element
Notepad++
Komodo Edit

Website Validation
Xenu Link Checker
Dead Link Checker
Wave
Markup Validation Service
HTML Validator
Total Validator