Love Bike
Makes tandem bicycles and tandem bike child parent, and tandem mountain bikes. USA.
http://www.lovebike.com

International Tandem Network
eTandem Europa is a project funded by the European Commission as part of the European Year of Languages 2001. eTandem Europa's objective is to introduce as many European citizens as possible to the opportunity of learning a foreign language with eTandem and to make it easy for these language learners to get started.
http://www.slf.ruhr-uni-bochum.de/etandem/etindex-de.html

T-AX-O GmbH
Tandem-Tieflader für das Baugewerbe; Tandem-Anhänger mit Pritschen-, Schiebeplanen- und Kofferaufbau für das Transportgewerbe. [D-08412 Werdau]
http://www.t-ax-o.biz/

Hase Bikes
Firma Hase ist Hersteller der Liegedreiräder Kettwiesel und Lepus, Langlieger Tagun, Stufentandems (Pino) und Kindertrailer (Trets). Company Hase Spezialräder is the producer of the trikes (Kettwiesel and Lepus), recumbent bike (Tagun) and the tandem (Pino).
http://www.hasebikes.com

Tandem Server Bochum
Neben der Unterstützung des Sprachenlernens im Tandem werden auch Tandempartner für alle Sprachen kostenlos vermittelt. Auch für Klassen und Gruppen.
http://www.slf.ruhr-uni-bochum.de/bochum-deu.html

mreps : maximal tandem repeats search
Open source tool for identifying serial repeats (tandem repeats) in DNA sequences.
http://bioinfo.lifl.fr/mreps/

Tandem Repeats Finder
Locates and displays tandem repeats in DNA sequences.
http://tandem.bu.edu/trf/trf.html

TANDEM To ANSI C Conversion Suite
TANDEM Cobol85 & TAL source code to ANSI C, C++ or Java and SCobol to Delphi.Net or DHTML conversion tool
http://tandem2c.com/

Performance Variable
Manufacturer of "Contrail" and "Spark" main canopies, "Quick Reserve" reserve canopies, "Omega" containers and the "Performance Tandem" tandem container.
http://www.performance-variable.com/

Cas Bikes
Custom carbon fiber bicycles for road, tandem and triathlon. Aerodynamic laterally stiff frame for every day use. Patent design and processs.
http://www.cas-bikes.com/