Connect2it, LLC
Spring probes, pogo probes BGA, PGA, LGA probes and fine interconnects, conductive elastomers, micro test clips, switch probes, automotive probes, automation test systems and pin loaders. (Pop-ups and consoles too)
http://www.connect2it.com/

Idems Ultrasonic Ltd. (Israel)
2D, 2.5D and 3D probes.
http://www.technion.ac.il/technion/dimotech/idems.html

Piezoelectric materials for ultrasonic probes
M. Lach, M. Platte, A. Ries (NDTnet)
http://www.ndt.net/article/platte2/platte2.htm

Application related evaluation of ultrasonic probes
Dr. Werner Roye,Udo Schlengermann, KRAUTKRÄMER GmbH and Co. oHG, D - Hürth (NDT-net).
http://www.ndt.net/article/wcndt00/papers/idn156/idn156.htm

Some Characteristic Parameters of Ultrasonic Phased Array Probes and Equipments
H. Wüstenberg, A. Erhard, G. Schenk BAM - Berlin (NDT-net)
http://www.ndt.net/article/v04n04/wuesten/wuesten.htm

Rhosonics (Netherlands)
Ultrasonic inline analyzers, sensors and probes for analysis of concentration, density or composition of liquids, emulsions and slurries. Suitable for binary and ternary liquids.
http://www.rhosonics.nl/

Xactex Corp.
Offers a range of ultrasonic and eddy current testing systems . Products include immersion tanks, probes and transducers .
http://www.xactex.com/

Quality Thermistor Inc.
Manufactures through hole and SMD NTC and PTC thermistors, thermistor beads and probes, temperature probes and thermistor probes. Online catalogue, application notes and purchasing.
http://www.thermistor.com/

Centurion NDT, Inc.
Designs, manufactures, markets and services eddy current and ultrasonic test instruments as well as probes, transducers and test blocks.
http://www.centurionndt.com/

VM Products, Inc.
Designs and manufactures application-specific eddy current probes and reference standards for aerospace, automotive, component testing, and marine industries. Also sells ultrasonic transducers.
http://www.vmproducts.net/