E2 Linux
E2 Linux is an umbrella name for Linux distributions designed to control digital television receivers (DVB-S, DVB-C, and DVB-T), set-top boxes and IPTV receivers. E2 Linux was originally developed for Dreambox receivers, but after 2010 a number of other manufacturers began shipping devices with E2 Linux, including Formuler, GigaBlue, Octagon, Opticum, Unibox, Vu+, and Zgemma.