### Other interesting projects by me:

**R packages**(2013-…)

R packages for Mortality tables and Life insurance contracts, both available on CRAN.**WooCommerce and WordPress plugins****(2015-2018)**

Several extensions for WooCommerce and wordpress.**VirtueMart (2012-2017)**

Joomla-based e-Commerce system. Several contributions by me, including fully configurable invoice layouting. I also developed several plugins for VirtueMart.**LilyPond (2007-2013)**

The GNU music typesetting application. I am responsible for most of the MusicXML import functionality, as well as many core features and tweaks.**KOrganizer (2002-2005)**

Maintainer of the calendar and schedulling application of KDE**KPilot conduits (2002)**

KPilot is KDE‘s PalmOS handheld sync application. I rewrote the calendar, todo and addressbook conduit, and wrote a time, AvantGo and PalmDoc conduit from scratch.**CSSSave` package for Mathematica 4 (1999):**

A package for Mathematica 4 that extends the HTMLSave command to also convert colors, spacing and borders. Download version 1.0 from its homepage.**VDMSL` package for Mathematica in formal methods (B. Aichernigg and R. Kainhofer, 1998/99)**

A package to use Mathematica in formal methods (for specifying and validating software). I provide functions and syntax to use the VDM-SL language with Mathematica. This package was also presented at a NASA congress in 2000.**M@th Desktop by Deltasoft mathematics (1998 – 2015)**

Mathematica Notebooks for easily learning Maths (especially the things you learn in high school). I worked together with R. Simonovits, C. Giraldo and some other enthusiastic guys.**Summer Internship at Wolfram Research (1998)**

During summer break 1998 I worked for Wolfram Research, Inc, the makers of the famous Mathematics software Mathematica, in Champaign, Illinois.**Maths & Fun (1997)**

Mathematica Notebooks to be used in Mathematics lessons in High school. I wrote the setup program for the CD-ROM (which was created by Simonovits, Wilding, et al.)**RK Ancient Fonts (1997)**

FREE TrueType Fonts for Windows for ancient languages (Sanskrit, Oldgreek with accents, Oldpersian cuneiform etc.)**Super Mind (1995)**

A shareware game (a MasterMind version for windows). In my opinion (and not only in my opinion) better than many commercial programs.**Vaccination PRO (1993)**

Vaccination planer for windows, including a database with the most common vaccinations etc. This program coded by M. Lacher and R. Kainhofer won the 2nd prize of the Austrian youth programming competition in 1993.