Co-creator of Django: http://www.djangoproject.com/

Working on Soundslice (interactive sheet music/tablature, "the Internet's finest music learning experience"): http://www.soundslice.com/

Founded EveryBlock (neighborhood news and discussion, now defunct)

Made http://www.chicagocrime.org/ (one of the original Google Maps mashups, now defunct)

Listen to my album of 10 original guitar tunes: https://www.holovaty.com/melodic-guitar-music/

Guitar videos: http://youtube.com/adrianholovaty