48f328a1_Convert_AVI_to_Various_Formats__Key_Features
[Top AVI Converter] 6. Handbrake [Pros] A user-friendly application that you can use no matter what your operating system is with some interesting editing options. [Cons] It will only support your conversions from AVI to MP4 or MKV. [Key Features] 
An option for both Windows, Mac and Linux users. However, it is very important to keep in mind that it will work for you if you are trying to convert from AVI to MP4 or MKV. Other than that, this a good looking, easy-to-use and lightweight application.
Top 20 Free AVI Converter - Convert AVI to Various Formats
Key Features