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MP3 Chopper is a ringtone editor that supports multiple formats
Select a song, edit it and set it as a ringtone
Ringtone Maker Pro
Edit and share your own ringtones with Ringtone Maker
Customize your contacts with funkytones and animations
Funkytone LightSleepr Ringtone
Zedge is a huge ringtone and wallpaper database sorted by category.
Mysterious and spooky: Chilling collection of sounds for your ringtone...
Scary Sound Effects
Listen and decide which ones you're going to use
Best SMS Ringtones Sounds
Create a playlist of ringtones and use them all
TA Ringtone Changer
A simple collection of many ringtones to choose