title: Stable alternative to RXTX
body: <p>After using RXTX for a number of different projects, I've come across many annoying discrepancies and issues that can only sensibly be put down to bugs in the library - deadlocks, race hazards, and monitor threads deep in the RXTX library being left open preventing the program from closing (even though all ports I was using have been closed!) Running the latest "unstable" version has helped a bit, but it's still far from where I'd call it reliable, and activity on the project seems rather low at present.</p>
  
  <p>However, searching for free cross-platform alternatives to RXTX doesn't seem to come up with much else.</p>
  
  <p>Is there another library that anyone's tried with more luck? I don't need parallel port support, just serial, and it doesn't necessarily have to be compatible with RXTX or the <code>javax.comm</code> API.</p>