JUSTones is an intuitive Ringtone and SMS Tone Manager. You can set Ringtones as well as SMS Tones (individual as well as Group tones) using the built-in ringtones or using mp3 files from your storage card. Just by using the right arrow key, you can Play/Stop an existing ringtone for any contact or group. Select multiple contacts from the main screen and set a Ringtone (or SMS Tone) for them. Contact names and Ringtone/ SMS Tone names are displayed together for any contact/group.

Export/Backup your SMS and save it to SDCard or send by E-mail.
CSV, TSV formats are supported.

RemoteDroid allows you to access your Android phone remotely using another mobile device. Even a non-Android phone!

It gets you notified when you receive a call or a message.
It receives your messages.
It can access your contacts.
It can access your Inbox, even your unread messages.
It can access your Calendar.
It can get the location of your Android phone.
It can set your phone's ring volume and screen lock.
It forwards your call.
It sends (SMS) text messages from your phone even when your phone is not with you.

Find and delete messages by keyword, time or contact. Must have for people with unlimited messages

# Delete SMS with specific words
# Delete SMS older than a time
# Delete SMS from/to a contact
# Make tasks automatic. Running in background without opening the app

Pictures say more than a thousand words - but smileys are SO last millennium! :-)

Send customized one-click sms responses to calls you don't answer.

This is also useful if you are already on a call, and another call is coming in.

NOTE: Security restrictions on the Droid block in-call notifications until your calls have ended.

Also see Call Waiting Configurations to avoid missing calls & sms messages

The cheapest way to make a SMS Contest. Use SMS Contest to make SMS polls, to make sweepstakes, to make a survey, and get the results instantly in the easyest way without any extra cost.

Missed Call or SMS Notification so that you will not miss any important missed call or sms residing in the phone

This app will teach you the NATO phonetic alphabet and the morse code value of letters and numbers. It will also encode/translate text into the NATO Phonetic Alphabet and into morse code. Once you have encoded/translated your text, you can save it to later retrieve it instead of re-typing your text every time. You can also copy the morse code to clipboard, nato text to clipboard and send it using email or text messages.