Apps with 'Custom notifications' feature

K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable notifications and more.

KVIrc is a free portable IRC client based on the excellent Qt GUI toolkit. KVirc is being written by Szymon Stefanek and the KVIrc Development Team with the contribution of many IRC addicted developers around the world.

Displays Social Proof & Recent Sales messages with four different types of Notification Pop-Ups

Voluum is known in the digital advertising industry as a leading and the most sophisticated performance tracker. With insights into user acquisition and lead generation campaigns, we know everything about the performance. So do you, if you’re using Voluum.

Allow notify yourself of important events.

CPV Lab Pro is a powerful and affordable self-hosted Ad and Affiliate Tracker that can optimize your campaigns, conversions and increase ROI.

Pushy is a reliable push notification gateway for time-sensitive, mission-critical apps.

True Edge: Notification buddy will alert you of incoming notifications with spectacular edge lighting effects. Who needs the LED when you have True Edge by your side! This amazing app also gives you the ability to interact with notifications right on your screen.

AOA is a ground breaking always on display app which allows you to interact with your notifications, view time/date, weather forecast, control your music, set app shortcuts, and much more right on your AOA screen.