Apps created and published by yuriburger.net can be labeled as "utility apps": simple Apps that fit a specific need. Mostly SharePoint Hosted Apps based around common SharePoint components, like lists and libraries. And for the larger part available for free!
About the author/ developer:
Yuri Burger is a Microsoft Certified Solution Master for SharePoint and lead architect working for Delta-N, an IT Services company based in the Netherlands (the Hague). Currently involved in designing and developing sustainable SharePoint solutions for customers.
There is an App for That!