Aminoglycosides Pharmacokinetics Tool helps clinical pharmacists dose gentamicin, tobramycin, and amikacin according to a few common methods.
It's available directly here.
It can also be installed to a local server with ease, as it is purely static content; all behavior is client side and nothing is ever posted. In fact, APKT can be saved and accessed directly from disk, though that's more convenient using this version for boring technical reasons. It is behaviorally identical.