You mean like the Chinese, the Hopi, the Maya, the Aztec, the Sumerians, the web.bot, Edgar Cayce, Nostradamus, and Mother Shipton?
Most of those are made up. The only ones that specify 2012 in any way are the Maya, and they did not predict any dangerous events for that date. The Aztec did not use the long count calendar as far as we know. We have pages discussing Mother Shipton, Nostradamus, and the I Ching (chinese) versions. We’re working on one for the web bot. The Sumerians were brought into the story via Zecharia Sitchin and Nibiru, and had no prediction for 2012.