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You can try aimersoft video converter which can convert video to video, video to audio and audio to audio, supported formats include MP4, AVI, MPEG, WMV, FLV, RMVB, MOV,3GP, WMA, MP3, M4A etc.
You can get more details and free download it at here
As I’m using this tool, the editing function is very useful for me such as video crop, movie trim, and video effect adjustment. You can also set encoding parameters (including resolution, bit rate, frame rate, brightness, saturation, and aspect ratio) to get the best video quality.
“Burn” – yes that’s all its called. Its a burning utility. Its not as robust as Toast Titanium, but its free and much better than the built in OS X burn folder.
The words “free trial” or “trial version” are indicative of shareware.
The aim of shareware is to give buyers the opportunity to use the program and judge its usefulness before purchasing a license for the full version of the software.
“Open Office” – if you don’t want to pay for Microsoft Office but still need access to its files (either reading or writing), why not use this free open source office suite.
StuffIt / UnRarX – the combination of the two will make sure you can deal with any kind of compression task that comes your way.
Shareware is often offered without support, updates, or help menus, which only become available with the purchase of a license.
The term shareware, popularized by Bob Wallace[1], refers to proprietary software that is provided to users without payment on a trial basis and is often limited by any combination of functionality, availability or convenience. Shareware is often offered as a download from an Internet website or as a compact disc included with a periodical such as a newspaper or magazine.
Shareware is usually offered as a trial version with certain features only available after the license is purchased, or as a full version, but for a trial period. Once the trial period has passed the program may stop running until a license is purchased.

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