Everybody should concentrate on his strenghts and shouldn't bother too much with things which need too much time to work in. Because of this I offer IT services since fall 2012 to protect my clients against unpleasant surprises and annoying problems.
(German)
Free knowledge also has something to do with relaying his own knowledge. I prefer personal contact for this but I also have a german/english blog. There I write about political, technical or completely different topics that concern me or which I want to bring closer to my readers.
(Partly German, partly English)