While this is a secular webpage, and lists all manner of publishers from those specializing in erotica all the way through to Christian publishers, Piers Anthony is on a mission to help writers find good publishing options, while avoiding shady ones. This is a lengthy list of publishers, with observations and comments that Piers has received from those who have dealt with the company. He tries to check out the reports, to verify if what is said is valid, and posts updates if things change. If you're considering a publisher that you don't know a lot about, you might consider checking out if they have a write up there. The list is alphabetical, sub-linked by letter, and easy to navigate.