Ivy is a simple protocol and a set of open-source (LGPL) libraries and programs that allows applications to broadcast information through text messages, with a subscription mechanism based on regular expressions. Ivy libraries are available in C, C++, Java, Python and Perl, on Windows and Unix boxes and on Macs. Several Ivy utilities and hardware drivers are available too.
Ivy is currently used in research projects in the air traffic control and human-computer interaction research communities as well as in commercial products. It is also taught to CS students.