Wikipedia
ELOG
ELOG is a Web application written by Stefan Ritt in C which can be used to create personal and common logbooks. It has been developed at the Paul Scherrer Institute originally for shift logbooks in the particle physics experiment MEG, but is now widely used in other fields. Besides the CERN experiments LHCb and CMS is it used on the US coastguard icebreaker USCGC Healy and part of the Debian distribution.
ELOG is licensed under the GNU General Public License as free software. It is currently available in 13 languages.