Since I'm currently playing a tinker gnome alchemist, I figured I'd post a little list of the main sources I'm using:
- MaoF Gnome Artificer PrC: harsh entry requirements and seriously underpowered, but the most "official" source. With a lenient DM, this one can easily be done entirely non-magical (waive the spellcasting req., replace some of the higher device powers).
- "Powerclasses: Artificer" by Mongoose: seriously overpowered (it essentially duplicates the Gnome Artificer abilities, plus a bunch more, and it's not even a PrC!)
- "Magic" by AEG: has a section on technomancy and tinkering. Been a while since I looked at this one, but I remember it as being fairly well done. It provides a new baseclass built on the Druid framework, but using Int, with a custom spell list, and with mechanical creatures instead of animal companions.
- "Quintessential Gnome" by Mongoose: lots of details on non-magical tinkering and construction rules. Too much details and numbercrunching for my taste, and doesn't seem geared (no pun intended) to PC use.
- "Sorcery and Steam" by FFG: steampunk setting, lots of both magical and non-magical "steamcraft" inventions. A bit of a dissapointment, because it seems very poorly structured, and has *no* construction rules. Does have a few new base classes and PrCs that may be of interest. See
this thread for some comments.
Note that there is also a steampunk/tinkering book (PDF?) coming out from ENPublishing fairly soon. "Steam & Steel: A Guide to Fantasy Steamworks,", written by ENWorlder Carnifex. Should be available within the month or so. More details over on the Sorcery and Steam thread I posted above.
Personally I'm using a Gnome Artificer, with a lot of leeway from my DM. Hoping to add some of the clockwork creatures from "Powerclasses: Artificer" or "Magic". For Alchemy, I've collected well over 200 different alchemical preparations from various published sources. (Most of them are fairly well balanced, but stay away from Bastion Press' "Alchemy & Herbalists"!)
Edit: also check out the
Dave's Rather Eclectic Attempt at a Steampunk Setting thread. Includes a table of contents for Steam & Steel towards the end.