On the XBox One (and hopefully Windows 10 when the linking finishes), Microsoft is releasing the Rare collection called Rare Replay on August 4th, 2015.
http://www.xbox.com/en-US/games/rare-replay
It includes titles exclusive to Rare such as Battletoads, Banjo-Kazooie and its sequels, Jet Force Gemini, Viva Pinata, Perfect Dark, Killer Instinct, and more. Unfortunately it means the Donkey Kong Country games are out of the question, but you can get Conker's Bad Fur Day in its original N64 version (meaning, less censoring).
I don't have the XBox One but hopefully it's available to Windows 10 (though I'll need to look into how the linking works) via what a friend told me. I'll have my fingers crossed!
But for those that have XBox Ones, now you will be able to enjoy a collection of Rare games for a really cheap price!