A very useful Fortran 90 reference.
Reference for MPI routines and one limited to MPI-1 routines.
NASA has a handy reference entitled Grammar, Punctuation, and Capitalization: A Handbook for Technical Writers and Editors available on-line and in the PDF format.
A reference on phrasal verbs can be found on the the UsingEnglish.com website.
The input reference for the CP2K simulation program. Some tutorials can be found on its forum page.
CHARMM Documentation; as of this update, the latest version is for CHARMM version c35b1.
Accumulated Ubuntu CD and DVD images.
IPv6 reachability tester. The bouncing Google came after the dancing turtle.