- LandWare
 - Software and hardware products for Palm, WinCE, Newton and other handheld devices. - Stand Alone, Inc.
- Offers a variety of games, applications, and utilities for the NewtonOS, PalmOS, and other operating systems.
- NS BASIC Corporation
- Offers NS Basic for Palm, CE, and Newton devices for programming on your device.
- Catamount Software
- Developers of Aloha, PocketMoney, MPG and many other packages for Newton PDAs.
- Foundation Systems
- Develops Newton productivity applications.
- Innovative Computer Solutions
- WalletWare, Inc.
- Makers of ExpensePlus for Newton and Windows CE, and Equate for Newton.
- Green Mountain Software Corporation
- Developed applications for health care, sales automation, film and video production municipal government, communications
- PelicanWare, Inc.
- Newton productivity applications
- Shokwave Software
- Contract software development house in the Austin area. We have expertise in MacintoshOS, NewtonOS, and world wide web.
- Sine of the Times
- Scientific/mathematical software for the Newton.
- Mac-Barcode Company
- Provides bar code and inventory control solutions for the Macintosh, MacOS, and the Newton Platform.
- Rindle & Partner GmbH
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