BSproxy is a simple proxy to enable rawmode-only telnet clients (for example, the one that comes with Windows) to communicate sensibly with linemode-only telnet servers (for example, LambdaMOO variants.). It runs on Linux and Windows, although the Linux build isn't very thoroughly tested owing to the fact that it's more efficient to patch Lambda to get the same effect. They build from the same source, though. Source, amd64 exe, and Win32 exe included. make clean&&make bs to build it for whatever architecture you're using. It did run on i386 Linux when I had a 32-bit machine to test it on; I haven't tested it on other architectures.
Download version 1.0. It's available under the GNU GPL.