It follows the Corporate Design of the Powerpoint Templates the TU Dortmund supplies.
Feel free to use it. License is BEERWARE.
To install this into your local TeXLive System so you can use it anywhere without copying file, use:
$ git clone https://github.com/maxnoe/tudobeamertheme $(kpsewhich --var-value TEXMFHOME)/tex/latex/tudobeamertheme