No specific info about version 1.3. Please visit the main page of Mailchecker on Software Informer.
CheckMail is a powerful POP3 email checking program.
Keeps you informed at all times of the status of your Internet connection.
It's a flexible check-in and check-out transaction management software
CheckInOut Pro for Windows: simple equipment/items tracking system
Configure how often you want the program to check for new emails.
gTray is a small C# application that checks your Gmail inbox for new emails.