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Video editor with collaborative features

Cut and convert video files

Convert to AVI and other formats all your favorite video files in one go

Play, edit, and convert MP4 videos to MP3, WMA, and OGG files

XP Codec Pack is one of the most complete codec packs

Imports, manages and writes video files on disks

Windows

Windows Mac

Yongyang Nie

Free

Math Tree is a multi-function calculator made by a middle school student.