Hi there! I hope that I can be of some help on Stackoverflow!

Things that I do now:

Experimenting with Unity 3D apps, not only for games, but also for business.

Also working on my music compose/play iPad apps RavelNotes, RavelNotesBasic (in Apple's Appstore) and RavelnotesPro. Originally in Objective C but now in Swift.

Since 2012: Application development for iPad, iPhone, using Xcode with Objective-C and Swift (recently), SQLite. and/or Unity.

The following is currently more or less in a passive state:

• Since 2005: MsWindows desktop and tablet db apps using .NET C#. with Microsoft Visual Studio, MySQL, Postgres, SQLite.

• Since 2003: Java/Swing/JavaFX Desktop GUI applications and Web services (REST) with any SQL based database.

Ancient technology:

• Since 1980: Technical design and programming of IBM mainframe database applications, batch and online (CICS): banking, insurance, client registration, loans, credit, payment services, etc. using Cobol and PL/1, z/OS C/C++, REXX, JCL, Fortran etc. mainly with DB2 relational database on z/OS, MVS/TSO-ISPF and VM/SP CMS. Familiar with ancient mainframe techniques like VSAM, DL/1 etc. Also, with the emphasis on software conversion from IBM mainframe to other technologies.

I prefer to write in English, however German and Dutch (native) are also supported.