Daif (20k) the smallest Arabic Dictionary (It requires Arabic enabled Windows and and Internet connection)
Al-Waseet (11k) An editor that lets you type Arabic srings in the Lain Applications that do not support Arabic)
Metapad (93k) Similar program to the famous "Notepad" with more enhanced features
Free Budget (943k) This program helps you to count the project word count (when you have many files with different formats in the same project)
Trados Tools:
Muliterm Converter (82k) Converts the excel sheets into Multiterm for Trados
Basic use of MultiTerm 5 (16k) How to use Trados Multiterm.