qCheckGmail is NOT my original work, I just forked this project to be able to fix a few compilation errors on Slackware64 14.0
The author of the program is [mhogomchungu] 1 and you can find it's original work [here] 2

qCheckGmail is a Qt/C++ multiple gmail account checker

Supported features:

-Multiple accounts

-Multiple labels

-tray pop up bubble can show accounts by their account names or by an alternative display name

-Operations not blocking the UI and plasma-desktop

-Keys are stored in kwallet

-Automatic new email checks with configurable time interval

-Manual email check

-Ability to pause and unpause automatic email checks

-The tray icon is the primary way the application informs the user of the state of the application and of the email accounts.

On any error encountered,the tray icon will turn red and the pop up bubble with have an explanation of the error.

After an update check,if new emails are found,the tray icon will turn bluish and the pop up bubble will have an explanation of what accounts have new email.The icon will change its state to "need attention" and plasma desktop will unhide it by default.

After an update check,if all accounts have no new email,the icon will turn greyish and will change its state to "normal" and plasma desktop will hide it by default.

The latest version can be downloaded from the following link: https://github.com/mhogomchungu/qCheckGMail/tarball/1.0.0