A few (at least seemingly) missing stream operations in Common Lisp.
This library adds a few stream manipulation facilities that I haven't been able to figure out using CL's stream facilities. These include:
make-pipe: Make a two way stream (though not of type two-way-stream) that
accepts data (via writing to it) and that data can then be read from it. This
is similar to the piping mechanism in the shell.
connect-streams: Take an input stream and an output stream and feed all data
from the input stream to the output stream. Again, similar to the way shell
pipes act, but this is for two existing streams and the other creates two new
streams (well, one new two way stream).
Just now it occurred to me that it would be cool to have this provide a CL (gray) stream interface for ZeroMQ. Most of the work is already done, I believe...