The murus de
is a collection of reusable software components, constructed in the academic context of teaching software engineering, algorithms and data structures, concurrent programming and mathematics at the Department of Mathematics and Computer Science of the Freie Universität Berlin.

They were originally written in Modula-2 by Niklaus Wirth (old, but still alive):

Most components were also ported to Java (sucks) Now, all components are ported to Googles new language Go 1 (really cool):
Maintainer: Christian Maurer e-mail to » murus.org Last modified: February 24 2013