DVBlast
DVBlast is written to be the core of a custom IRD, CID, or ASI gateway, based on a PC with a Linux-supported card. It is very lightweight and stable, designed for 24/7 operation.
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OnionMedia
Open-Source Mediaconverter and downloader.
Zamzar
Online file converter, providing easy to use file conversion and compression for hundreds of different file formats. Includes support for document, video, image, audio, CAD and more. Also offers a desktop app and powerful API for developers.