There is the Pirkei Avot that contains 5 chapters that are part of the Mishnah in the order of Nezikin. This is the version that is typically studied on Shabbat afternoons between end of Pesach to just before Rosh Hashanna (the 6th chapter is from elsewhere.)
There is another version - Avot Derav Nattan, and a 3rd version that I know of Pirkei Derav Eliezer.
Are there any others?
I'd also like a brief description of what the differences in these versions are and why these different versions were created, if there was some motive historically or otherwise for these authors to create these. I'm assuming that from the name of the work (Avot or Pirkei) there might have been some motive they had to add or explain something that wasn't in the "original" Mishnaic version.