Übersicht zum Betäubungsmittelstrafrecht im JuraWiki.
Ralf Zosel in LAWgical announces a summary (in German) of drugs offences in JuraWiki.
This is highly valuable for anyone interpreting in German courts or attending them as a visitor, as I can confirm from many years of visiting the courts with groups of students. It may look like a summary of the statute, but it is reorganized in a logical approach to the topic.
Link via Vertretbar Weblawg, a reincarnation of vertretbar.de, which has moved and is using WordPress instead of Movable Type.
Here are some links on drugs offences in the UK, for example this informative site.