SoftTTY 1.4 (Mac)
Source: Intelligent Products
Finally, a full-featured TTY is available for the Macintosh. SoftTTY does everything you want a TTY to do and then some. It works with most Macs without any additional hardware. You can now use the full power of your computer to enhance your TTY experience. You no longer have to suffer with miniature TTY displays, scrunched up keyboards or the massive TTY paper pileup phenomenon (MTPPP). SoftTTY performs all the functions you want in a full-featured TTY, for a very small fraction of the cost.