/r/GifSound: GifSound - Gif Sound Mashups / Gifs with Sound Combos - June 11, 2015 - 04:21
/r/mashupgifs: Pop culture mash-up gifs - Gifs of movie nad tv mash-ups - May 15, 2015 - 06:59
/r/combinedgifs: gif+gif - A subreddit for gifs put together in a relevant manner. - May 14, 2015 - 13:06