1)   Tinnitus Masker Pro : Tinnitus Relief Software 2.1
Tinnitus Masker Pro allows you to choose from 14 different sounds and change their parameters so you can achieve the best masking effect for your tinnitus symptoms. Tinnitus Masker Pro is extremely easy to use and get to grips with.

 2)   ToneTester 1.0
ToneTester is a Macintosh application that tests hearing. Specifically, it looks for offsets in how each of a person's ears hears pitch (the formal term for this is "binaural diplacusis" or "interaural pitch difference").