Amoeba

Amoeba
Powerful free, open source, microkernel-based system that turns a collection of workstations or single-board computers into a transparent distributed system. Used in academia, industry, and government for many years. Runs on many platforms.
http://www.cs.vu.nl/pub/amoeba/

Bibliography on the Distributed Operating System Amoeba
Part of the Computer Science Bibliographies: search, browsing, statistics.
http://liinwww.ira.uka.de/bibliography/Distributed/amoeba.html