SMS2PC is an application that rapidly allows you to send and receive messages using your phone from your computer.

Flashbook is built with a powerful Android database engine, yet is still an easy to use and dependable flashcard application. It's the perfect study tool for students on the go. Free access to millions of cards on virtually any subject is included and you can easily create cards from your own study materials.

"VIA Express" is compact, light-weight application intended to be used as
traveling evidence tool. It allows you to record and track your journeys and
(when paired with online service account) synchronise journey data with
online service or simply keep it in your mobile device.

Notation, composition & songwriting app for composing sheet music on the go.

Turn your smartphone or tablet into a modern baby monitor! (full version)

These two stories by Koos Rozemond, with English translations by Aart van den End.