Ringo is a fun and powerful way to customize sms ringtones for each of your contacts. Simply pick your friends inside Ringo and pick a ringtone or SMS tone - you'll know instantly who is texting or calling you!
For further features - including caller announcing and SMS announce, check out Ringo Pro which lets you use any music as an MP3 ringtone or SMS tone, SMS nag - even set different tones, lights and vibrates for each contact!
If you are using Ringo with GO SMS Pro or Handcent, note that these apps can disable the SMS notifications for all other apps, including Ringo, which stops Ringo working. You can fix this in their settings.
In GO SMS Pro, tap Menu / Settings / Advanced tab / Notification Settings, and uncheck Notifications. Then go to Receive Settings and un-check 'Disable other message notification'.
In Handcent, Tap Menu / Settings / Application Settings.
Tap 'Default Messaging Application', and choose Disable.
Then turn on 'Lower priority'.