Its ad free version of SMS Notifier(http://slideme.org/application/sms-notifier-0). SMS Notifier (SMS Popup) displays your SMS or message in a smart and simple way. It provides a better status bar notification and SMS popup with quick reply, delete and mark as read options. A very small and low memory consuming app. You can customise SMS notifier very easily.
Features:
- Elegant popup window on incoming SMS/message.
- Mark as read, delete, reply directly from the sms popup.
- Popup show contact name, contact number, time, sms content, contact picture.
- Contact option on sms popup like call, messaging etc.
- Customize sms popup notification by setting it vibrate, ringtone.
- A better status bar notification.
- Group notification on android status bar.
- Unread SMS count with contact name/number on android status bar.

Note:- Please disable android default messaging sms notification. Go to android messaging app, then press Menu key, choose Settings and uncheck Notifications option.

Screenshots: