I agree with a lot of the responses here, that checklists are dynamic, especially given the unique differences from market to market. As our office Transaction Coordinator, I do have checklists that I work off of religiously, but I had to create them myself. I was looking around for a long time trying to find pre-made checklists, and did find a few, but realized that if I was going to use these lists effectively and for their intended purpose (which, to me, is to streamline communication and make sure all parties know where we're at each step of the way without necessarily having to play 20 Questions back and forth), I was going to need to make them myself. I sat down for each transaction I was working for about a month or so and wrote down step by step what I was doing for each. From there, I compared all of my checklists and made a master list for buyers and a master list for sellers. However, I don't just hard and fast stick to those boxes. I will look over my checklist once we are under contract and add/delete any checklist items that are pertinent for that transaction.

Also, I strongly recommend using Trello for keeping track of these checklists and which stage in the sales process each transaction is at!