Les logiciels produits par MK Software sont distribués par Dunkel Software Distribution, également connu depuis 1996 sous le nom de invers Software pour le développement et la distribution du logiciel de PAO Calamus.

Ulf Dunkel était le co-éditeur du magazine invers (désormais en supplément de Publishing Praxis) et il est également bien connu dans le monde de la PAO depuis plusieures années, il propose désormais des logiciels pour des plateformes et des Systèmes variés.

MK-Software développe des outils pour macOS depuis l'été 2002. Barcody, Charmas, Jobtimer, Notio et StartUp en sont des exemples. Michael Kammerlander (MK Software, Kirchlengern, Allemagne) connu pour avoir développé de nombreux modules pour Calamus le logiciel de PAO. Il travaille également sur la conception de sites Internet.

He is one of the decisive developers of iCalamus, the new publisher for macOS.

Dejal Systems, LLC is a one-person Macintosh software development company, owned and run full-time by David Sinclair. It is dedicated to the idea of creating fun, easy-to-use software for the Mac platform.

Dejal has provided many quality and flexible utilities to the Macintosh world over the years, starting back in 1991 with the pre-macOS gems QuickEncrypt and SndConverter Pro. Nowadays, pretty much everything is developed in native Cocoa for macOS, including Simon, Time Out, Caboodle, and more. In addition, Dejal provides consulting and contract programming services to help others produce great macOS software. Plus Dejal gives back to the community by making sample code available for developers.

Established in Auckland, New Zealand in September 1991, Dejal moved to Portland, Oregon, USA in April 2001 and was organized as a Limited Liability Company (LLC) in April 2002. (The name Dejal is pronounced DEE-JILL.)

Since 1996 Hyperbolic Software has produced acclaimed programs such as Tidy Up, MacGizmo, iTunes Dupes Barrier, Doublet Scan, Maigret and Smart Trash. The small software company of Giuseppe Giunto is situated in Italy.

Located in beautiful Parede, Portugal, SintraWorks is a privately funded company founded in 2006 by António Nunes. Committed to providing the highest quality software, SintraWorks' focus is developing productivity solutions for the Mac platform, with a major emphasis on total customer satisfaction.

Houdah Software s.à r.l. is a small company based in Luxembourg (Europe). The company was founded in late 2005 by Pierre Bernard.

Pierre has been a Mac user since 1984. This drew him to computer science. He earned his engineering degree in 1999. He worked at the Xerox Research Center Europe, the Central Bank of Luxembourg and consulted for prestigious clients. Since 2000 Pierre's development efforts focus on Apple technologies.

Mariner Software, Inc., developers of the industry-recognized products, MacJournal, Mariner Write, Mariner Calc, Montage, WinJournal, StoryMill, Desktop Poet, MacGourmet Deluxe, Contour, Paperless, Mariner Calc for iPhone and iPad, Contour for iPhone, MacJournal for iPhone and now Narrator, has established itself as one of the most diverse leaders in consumer, business, and educational writing and creativity markets for the Macintosh and Windows platforms. With customers worldwide, Mariner Software is committed to delivering the highest quality software, with an emphasis on total customer satisfaction.