RMRK Refers to the forums. For the site, see Crankeye.com
RMRK is short for RPG Maker Resource Kit, and is the forum of Crankeye.com.
When spoken in full, a "the" usually proceeds, making it The RPG Maker Resource Kit.
Though at first, "Crankeye" or "RMRK" or "The RPG Maker RK" used to synonymously refer to the site and forums together, nowadays when speaking of the forums, RMRK is generally used, whereas to refer to the site it is usually referred to simply as "Crankeye". This might be due to each word or phrase being the domain names respectively.