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.

Smart Vibrator is a little program that customizes vibration for incoming SMS and call.

An App that would allow to write in Arabic and SMS, with access to your contact list, powerful add if you speak Arabic.
your support is much appreciated

This app is a dumping ground for all your calls and sms. Just for fun you might want to look at who do you call the most, or what group of people you call or text the most.

See data for the last 7 hours/days/weeks/months.

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

Custom LED/sound/vibrate/status bar notifications for calls/sms/bluetooth/calendar/market events.

TTSNotifier: A speech notifier for android - Incoming calls, SMS (person and/or body), Wifi connect/disconnect, special ringtone support, user defined texts and more...

“MyCalls” helps you monitor your phone usage for voice, data and SMS.

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

Don't need ROOT access!!

Migrate / import SMS from Iphone, Window Mobile, Symbian (Nokia), BlackBerry, Sony Errison, Samsung, Siemens, and so on to your Android.

Very simple to keep your sms.

After install this app., check-out http://a.baole.org/home/sms-migrator to see how to migrate.

Contact by email if any problem.

This auto responder app allows you autoreply via sms to any incoming calls or sms during a specified time range that you schedule.

Features:
custom sms reply message
target specific contacts
repeat on weekly schedule

Works on Droid HTC Eris HTC Nexus One HTC Incredible plus more
Supports Android 2.0+ & Froyo
48-Hour Trial

As also found in the official Google Android Market:

This application is a call minutes, sms, mms and data usage meter to monitor your credit usage. Never exceed your quota again!

Supporters unlock: free times/contacts/groups; widget; usage log; greater configuration of plan inclusions + more. A free 5 day trial is offered.

Please report bugs!

Please visit http://creditusage.matthewwardrop.info for more information.

It's invisible, it's fast and it forwards all incoming text messages from your child's mobile to yours along with name and number.

Send a Sms in only one click !

It is a android firewal software,It support to message filter,block calls,app firewall,ftp pop3 smtp block and virus firewall.You can block some network application software to help you save flow! - 它是一款Android 防火墙软件，主要支持黑名单信息过滤，阻止来电，应用软件阻止网络，FTP，POP3，SMTP阻止，病毒防火墙等，你可以阻止一些联网的应用软件，帮助你节约网络流量！
More http://code.google.com/p/andbox/
https://www.slideme.org/user/18222/applications/18222

Watchlion helps you to keep some contacts private. All SMS message and call log will hide from the android system.

- Convert Unicode text to VIQR text.
- Easy to send Vietnamese SMS, Email...
- Save your money by sending VIQR SMS.
- One click copy to clipboard.
- Support portrait and landscape screen.
- Totally free.

This application lets you backup your SMS onto SD Card and restore from it.

This toolkit gives you FULL CONTROL over your message box, including following functions right now:
• Schedule messages to send
• Create fake messages
• Edit messages
• Backup/restore messages

Have you ever been trying to meet friends in a large public space, but been unable to find each other? I created GPS Share for just such a scenario.