Cincinnati Precision Instruments, Inc.
Provides sales and service of precision measuring devices as well as surveying optical equipment.
http://www.cpi1stop.com

Palatine Precision
Palatine Precision specialise in the production of high quality stainless steel bellows assemblies / components, using high tolerance TIG welding techniques
http://www.palatineprecision.co.uk

Oxford Lasers
Founded in 1977, Oxford Lasers produces Micromachining systems for accurately manufacturing small parts and features and high speed imaging systems for the characterising size, shape and velocity of most flows and particles.
http://www.oxfordlasers.com/

Versatile Engineering Company
Specializes in production of high precision, close tolerance, and miniature metal stampings. Examples include electrical connectors, small automotive parts, and medical devices.
http://versatileengineering.com

Ultra Precision SA
Ultra precision s.a. manufactures high precision contacts and related components for world-wide connector. Precision turned screw machine products in Brass alloy, CuBe and Heat treatment Selective zone annealing
http://www.ultraprecision.ch

Thornton Precision Components
British company specializing in precision forgings for worldwide orthopaedic, aerospace, and power generation industries. Includes surgical implants and devices, airfoils, airframe fittings, and compressor/turbine blades.
http://www.tpcl.com

SpeedFam-IPEC Inc.
Designs, develops, manufactures, markets and services high precision surface processing systems used in fabrication of thin film memory disk media, semiconductor wafers, general industrial components and semiconductor devices. (Nasdaq: SFAM).
http://www.speedfam.com/

STD Precision Gear & Instruments, Inc.
Manufacturer of high precision gears, splines and other related mechanical transmission components.
http://www.stdgear.com/

Raute Precision Oy
Finland. Manufacturers of precision weighing and dosing devices and complete systems for materials handling in the metallurgical, chemical, food, building materials and paper industries. English and Finnish.
http://www.rauteprecision.fi/

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