As far as I know, there is no equivalent in the Java world distcc.
As mentioned by Aaron, many continuous integration servers (open source, such as Hudson or commercial, such as Bamboo, TeamCity) support but I don't think this will solve your problem. AFAIK, these tools distribute assembly tasks (i.e. the whole assembly of several maven modules), rather than the assembly of several modules assembly modules (which may have dependencies, need the output of the previous module and thus cannot be parallelized in any case ) In other words, this is useful if you have many projects / branches on an assembly farm (at least for Hudson, I have less knowledge about other solutions).