MaximDL (internal guide software) – $400 (minimum) TheSkyX + Camera Add-on (internal guide software) – $530 (minimum) Sequence Generator Pro (can connect to PHD2 / Metaguid) – $100 It’s limited to just the ones I have at least a passing familiarity with (so it’s lacking remote automation and planning tools which I haven’t used).
Here’s my running list of astrophotography software packages.