HumBugSMS

Check this out, this application is a simple messaging application that allows you to text normally, but also gives the user the option to send "Fake" messages without actually sending them! You can set your date and time of when you supposedly sent the text message. You can also customize the application color on the fly to make it look like any other sms applications you use.

Note: this app does not support MMS, only SMS.

Please submit any bugs you may find.