PC Guard Professional software copy protection and licensing system for MS DOS and Windows. http://www.pc-guard.co.yu

Data Encryption Systems Limited Solutions for software copy protection, data encryption and software licensing. Hardware based (dongles) for multiple platforms. Free developers kit available. http://www.des.co.uk/

Matrix Hardware based system (Dongle) for the protection of your software from unauthorised reproduction. http://www.matrixlock.de/english/index.htm

SLockPK License control software using public key encryption. SlockPK gives you all the protection of a hardware key (dongle), but using a software system based on public key encryption. The most complete ESD solution available. http://www.crypto-central.com/slock/index.html

Sheriff Provides software developers with secure copy protection, solving the problems of software piracy without the need for royalty payments or dongles. Offers static library and free evaluation copy. http://www.sheriff-software.com

InfoSeer Provides advances in secure content control with products that protect intellectual property distribution throughout the web. http://www.infoseerinc.com

Rainbow Technologies Software protection devices, license management and encryption technology. http://www.rainbow.com/

Griffon Technologies WIBU-KEY license management, software protection, and copy protection. http://www.griftech.com/

Softlok Softlok specialise in software security, anti piracy solutions and protecting web-based information. http://www.softlok.com/

SignetSure Digital Signature shareware for C/C++ and VBasic developers. Your program authenticates a file with one API call. Protects files from unauthorized modification. http://www.SignetSure.com

Pace Anti-Piracy Provides next generation tools for distributing and selling software in a secure manner. Covers ESD, copy protection and license management. http://www.paceap.com/default.html

ActiveLock Open source ActiveX control to protect software from piracy and allow online registration. http://www.activelock.com/

Lockware (i-dongle) Copy protection using dongles and the Lockware method. http://www.Lockware.com/index1.htm

Wizzkey The WizzKey family offers a complete range of software protection products for PCs and networks. http://www.wizzkey.com

SoftwareKey Suppliers of Protection Plus software licensing and Solo e-commerce technology. http://www.softwarekey.com

SVK Protector Tool that enables profesional protection of software and securing products against unauthorized copying, use and distribution. http://www.anticracking.sk/

Microcosm Copy Protection Systems Ultra-secure copy protection and licence management systems for your software whether distributed by CDROM, DVD, the Internet, floppy disk or any other media. http://www.microcosm.co.uk

Deskey Software protection devices, copy protection, license management and encryption technology, anti piracy solutions. http://www.deskey.co.uk

StarForce Software Protection Advanced encryption and activation technology for CD/CD-R/DVD and electronic software distribution. http://www.star-force.com

SecuROM Sony DADC CD-Rom copy protection solution by Sony DADC. SecuROM offers online encryption and in-house testing. http://www.securom.com