Software
CCleaner
An excellent program for keeping your computer running at optimal performance
Malwarebytes
Used in conjunction with your Anti Virus software to keep your machine free of Malware
Libre Office
Open source all purpose Office Suite… Compatible with Microsoft Office
Inkscape
Alternative open source vector program to Coreldraw, runs on Linux, Mac OS X and Windows.
Notepad++
Enhanced text editor alternative for Notepad
GIMP
Alternative open source photo editing program similar to Photoshop
7-Zip
Free option to decompress zip, rar and many other compressed files
NCH Invoice
Awesome free feature loaded Invoicing system for companies with less than 5 employees
Blender 3d
Powerful open source 3d animation & video editing suite
Thunderbird
Open source easy to use email program