This is an open source software forge that can be put to production use. It is non-trivial to set up---you need to know all the included tools like mailman and subversion as well. Based on the original sourceforge.net code, however, it has proved its value over time.
We purchased GForge AS 5.5 in 2008.
The support is non-existant.
They take ages to fix bugs.
It is lacking some really simple things - espesially the document management tools.
It is extremely difficult to install.
Only a few linux distros are supported.
Only works on PostgreSQL.
Everyting works 95%, but it is the other 5% you really need to work.
The Office plugins and IDE tools does not work, is seriously useless.
GForge AS ended up costing our company a lot of time.
We are looking for ways to migrate to other alternatives.