Double-double precision
Fortran 90 code by Claire Moreau-Finot for double-double precision arithmetic. That is about a hundred bits of precision with a floating point notation. The library computes the exponential function radix 2 and e, the cosine and the sine.
http://perso.ens-lyon.fr/marc.daumas/SoftArith/ddouble.php?langue=en

Astronomical League Double Star Club
The purpose of the Double Star Club is to introduce observers to 100 of the finest double and multiple stars in the heavens.
http://www.astroleague.org/al/obsclubs/dblstar/dblstar1.html

High-Precision Software Directory
David Bailey's package for multiple precision, and packages for double-double (~32 dec. digits) and quad-double (~64 dec. digits) precision. The last two are in C++ with Fortran front ends.
http://crd.lbl.gov/~dhbailey/mpdist/mpdist.html

Masko Engineering Corp.
Masko Engineering Corporation is leading manucturer of Hydraulic jacks and accessories, hydraulic equipment, machanical screw jack, foot air pumps
http://www.maskohydraulics.com

Double Press Manufacturing, Inc.
Manufacturer of farm equipment designed to double compress two tie and three tie bales to less than half their original size.
http://www.doublepress.net/

Equipo Petrolero S.A.
Bolivian oilfield service company: slickline, logging-perforating, well testing, high pressure testing, nipple up, completion design and material, pressure and temperature survey.
http://www.equipetrol.com/

Double Decker Tours
Double Decker Bus Tours
http://www.doubledeckertours.com

Double Glazing UK
doubleglazing and replacementwindows suppliers UK. View our directory for the best links, tips and expert advice. Free brochures and quote service.
http://www.double-glazing-uk.co.uk

Double J Romagnolas
Double J Romagnolas, located in Menard, Texas, offers outstanding Romagnola genetics from around the world! We have cattle, semen, and embryos available at all times. We have registered the first polled Romagnola in the United States of America.
http://www.cowmans.com/12txjyat.htm

The "Double-Checked Locking is Broken" Declaration
Details on the reasons - some very subtle - why double-checked locking cannot be relied upon to be safe. Signed by a number of experts, including Sun engineers.
http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html