TomP2P 5 Beta 6 just released. Check out the latest beta version.

Minor changes: fixed issues in NAT and improved memory handling

Testing may not succeed all the time due to timing issues. This will be resolved.

<dependency>
  <groupId>net.tomp2p</groupId>
  <artifactId>tomp2p-{module}</artifactId>
  <version>5.0-Beta6</version>
</dependency>