These are definitely my favorite software marketing books, and all are related to the marketing, sales, strategy, or the business of software. Most are fairly recent but I've kept one or two oldies but goodies - like "Crossing the Chasm" - because I think there's still a lot to be learnt from them.
As time allows, I'll add my reviews/comments to each of these... but for now here's the list and the links, with those that I've reviewed listed below.
Here are my reviews of these books also: