GenToo: Gentoo provides an ebuild for rxtx.
Debian: Debian provides .deb packages for GNU/Linux.
Hewlett-Packard: Details on HP-UX version and platform support info are at HP-go-java.The SCO Group has a version of rxtx for their products.
Mathworks: Mathworks provides binaries for Solaris, Windows and Linux with its Instrument Toolbox.
Read this next paragraph and make sure you understand. It will save you time in the end.
The first question you need to answer is do you want to use RXTX 2.1 or RXTX 2.0. RXTX 2.1 is a complete solution that is in package gnu.io. Sun's implementation is in package javax.comm and works with RXTX 2.0 which is just the lower part of the solution. This means you can use either if you can change the package name in your source code. If a product you are using for calls for Sun's CommAPI (javax.comm), then you want to download 2.0 from Sun (currently not working but will be fixed by Sun and rxtx.org in May) and RXTX 2.0. If you are a developer wanting a single package for all platforms or a product asks for just RXTX then you want RXTX 2.1 (gnu.io). Get it? Got it? Good! Don't mix and match. So lets pick _one_.
Linux, Windows, Solaris, Mac OS rxtx-2.1-7-bins-r2.zip (Final) source/Mac OS X rxtx-2.1-7r2.zip (Final) The ToyBox: ToyBoxThe ToyBox has about 35 platforms (and growing). If you have a toy (even an s390), we have the ToyBox. Find the OS, Libc, and CPU You are looking for. Please report any problems to the mail-list. Unix users can extract zip files with jar -xf foo.zip. It works fine and on all platforms we support.
Linux rxtx-2.0-7pre1 w32 rxtx-2.0-7pre1 source/Mac OS X rxtx-2.0-7pre1 The ToyBox: Not Yet. Check Back After May.Do you just want to browse the files? If someone told you to get an older version, its probably a bad idea but the files are all there. You can even find rxtx-1.02p0 to get an idea how rxtx started.