Graft Flesh:
Fiend Folio has aboleth, beholder, fiendish, ilithid, maug (constructs), undead and yuan-ti grafts.
Libris Mortis has undead grafts.
Lords of Madness has aboleth, ilithid and silthilar grafts.


Some other books have grafts as well, with separate feats. A DM may let you pick those feats with Graft Mastery if you meet the requirements. These new grafts have silly rules about sticking to one type of graft and limiting you to five grafts. They also require a "sacrifice" of some sort - typically HP.

Faiths of Eberron has construct grafts.
Magic of Eberron has deathless, elemental and plant grafts.
Races of the Dragon has draconic grafts.

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The (Red) Dragon Familiar feat (lv 12) from Draconomicon + Aberrant Familiar can make a pretty badass familiar.

Loremaster is a good way to get the necessary ranks in heal.