Here's some pointers to Open Source code released by Paiq BV. Perhaps you've come across some of our webapplications?

Projects

Some of our websites have public APIs. Libraries and (example) applications that use these interfaces, made by us, are released under an open source license. They are hosted on github.

Specifications

Every now and then we keep reminding ourselves to document the stuff we make public. For now, we have published the ILMP specification.