AthTek owns three voice changers: Free Voice Changer, Skype Voice Changer and All-in-One Voice Changer. You can download any of the voice changers on this page. Rolling down then you will read more details about the Voice Changers. View the differences at AthTek Blog.
Free Voice ChangerFree for non-commercial use. You need to import an audio file to this Free Voice Changer, and then you would be able to change voice pitch as well as the speed of this audio file. Generally you can record your voice with with the free Windows Voice Recorder, and then import the recording file into AthTek Free Voice Changer. You would hear you voice in a funny way. Download Free Voice Changer
Skype Voice ChangerFree trial with some limitations. It's one of the most ever used Skype related software which you can find in Skype App Directory. With Skype Voice Changer, you can flexibly change your voice pitch during any Skype call. It also supports many free sound effects for you to have fun in the conversations over Skype. Download Free Trial of Skype Voice Changer
All-in-One Voice ChangerFree trial with some limitations. It's the third voice changer of AthTek Software. It is based on Skype Voice Changer and can not only support Skype for voice changing, but also other IM tools such as Yahoo Messenger and QQ International. It can also record and change the voice pitch with a microphone. The recordings will be saved as *.wma format files. Download Free Trial of All-in-One Voice Changer