- Enfour
UniDict, GoFetch (e-mail client), UniMail, UniCalcPro, Shodo, various accessories such as cables, some of it only available in Japan.
- Notwen (Adriano Angelillis)
Adriano Angelillis specializes in developing new and extending existing Newton ports.
- NuShield
The source of NuShield screen protectors for the MP2x00.
- PDA Concepts
Satellite, Hand Stand (Cases).
- Robowerk Shop (Matthias Melcher)
A breakout board for the Newton MP 2100.
