Emulators
- Nonpareil for old calculators for Windows
- Nonpareil for Mac
- For Power PC Mac
- HP45 simulator in Java
- V41 for HP 41c family
- Many other emulatorsfor HP41c, including for Mac
- Free42 for HP 42s
- For Windows
- For Mac
- As a dashboard widget
- For Ipod Touch, Iphone and Ipad: in Itunes shop
- For Android
- For Linux
- Skins for Windows, Unix and Mac
- Emu41 for DOS
- Emu42 for Pioneer Series without the ROM images but with instructions to get them from a real unit
- emu71 for the HP 71b
- emu48 for the HP 48 family and later.
- Wiindows
- MacOS
- PalmOS (Power48)
- emu50 with the best images
- X48 for Mac
- HP85 from Everett Kaser
- HP85B and HP87 from Olivier de Smet
- Hrastprogrammer's HP emulators page
- HP82240B Emulator page
- Hewlett Packard own Emulators page (including graphical, scientific and financial)