General Mumble
General Mumble is known as Poowis on youtube.
He features a variety of music. He's mostly known for his electronic type of music he makes.
One of many music producers within the Brony community.
RainbowCrash88
YouTube user that has created 8-bit versions of a number of the songs from the animated TV series My Little Pony: Friendship Is Magic that were originally composed by Daniel Ingram. His channel can be found at: www.youtube.com/user/RainbowCrash88
goreshit
goreshit is a one-man electronic music project from United Kingdom started in 2006. goreshit was primarily a lolicore artist (mostly breakcore and speedcore influenced), but later his style expanded to other genres such as idm, dark hardcore and dancecore. His tracks have appeared on several compilations and he has put out a number of full length albums and splits for free (mostly self-released but occasionally on netlabels such as Dance Corps.