Hitec DIGI Servos is programable via their USB/PC or standalone prog. box. Works super smooth. I use them or the print from the servos in my farmequipment. 180degr. rotation possible.
Hyperion servo is also programable from your PC with a cheap USB cable and free software.
http://media.hyperion.hk/dn/pc/sercom.htm
CTI is also an option to use with standart servos.
Servo fast
Servo slow
Servo for windscreen wiper
Servo for hydraulic movement, to leave the servo in one position even when the stick returns to zero...
All with adjustable speed.
http://www.flymotec.de/index.php/cat...o-Steller.html