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

"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.

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.