Vector's APL Product Guide
- Index of Companies and Organisations
- http://www.vector.org.uk/?fetch=prodguid/index1.inc

Rex Swain
- Independent consultant specializing in APL with over 25 years professional experience.
- http://www.rexswain.com/

APL Borealis
- The pre-eminent source for APL products and services in Canada.
- http://www.aplborealis.com/

Customized Applications, Inc.
- Customized applications and programming services, including rapid application development in APL.
- http://customized-applications.com/

APL Consultants and Software
- All about and around the programming language APL.
- http://www.aplteam.de/

Optima Systems
- A UK company specialising in bespoke APL software.
- http://www.optima-systems.co.uk/

Snake Island Research, Inc.
- Software development and consulting firm specializing in solving APL performance problems and training programmers. Technical Report on APEX APL compiler. APL (and related compiler/parallel) BiBTeX bibliographic files. APL fonts for LaTeX.
- http://www.snakeisland.com/

CoherentSystems: CoSy
- Computerized living with the APL-based CoSy NoteComputer. Free downloads!
- http://www.cosy.com/

Lescasse Consulting
- French APL based company. Proudly announce a form "driven by an APL+Win Web Server".
- http://www.lescasse.com/

Causeway Graphical Systems Ltd.
- Produces a range of graphical and reporting tools. Includes details of collaborations, products, support, and demos.
- http://www.causeway.co.uk/