http://www.gesetze-im-internet.de/
This website, being hosted by the German Ministry of Justice, provides nearly all German law texts in force, for free and in German. Additionally, it provides an English Version of parts of the German civil law.

http://www.bundesgesetzblatt.de/
This official website provides a limited free acceess to the online version of the Bundesgesetzblatt, Germany's official law journal. Full access requires registration and payment. The page is in German only.

https://www.ebundesanzeiger.de/
An online version of the official bulletin. For free and in German.

http://www.bundesgerichtshof.de/
The official web presence of the Bundesgerichtshof. It provides court decissions in german from 2000 on – free of charge. Earlier decisions can be ordered for a charge of 50 ct per page.

http://www.bundesverfassungsgericht.de/
This official website of the Bundesverfassungsgericht contains all decisions made from 1998 on for free and in german.

http://lexetius.com/
A database of court decisions, including decisions by the Bundesgerichtshof and the Bundesverfassungsgericht.