Emulators can be a convenient way to use your favourite calculator where ever you have access to a computer. Below is a list of some of the emulators I found on the net.
Emulator applications
Virtual TI
Emulates: various Texas Instruments models (TI-82, TI-83, TI-83 Plus, TI-85, TI-86, TI-89, TI-92/II/Plus)
Requires ROM: Yes
ROM available: No
OS: Windows
Tested: No
Last update: 2000
Emu28
Emulates: Hewlett-Packard HP-28C
Requires ROM: Yes
ROM available: No
OS: Windows
Tested: No
Last update: 2007
Emu42
Emulates: Hewlett-Packard HP-17/19/27/28/42
Requires ROM: Yes
ROM available: No
OS: Windows
Tested: No
Last update: 2007
Emu48
Emulates: Hewlett-Packard HP-38/39/40/48/49
Requires ROM: Yes
ROM available:
Yes, for HP-48
OS: Windows
Tested: Yes
Last update: 2007
HP-41 emulator - a list of HP-41(c) emulators.
Online emulators
HP-25
Emulates: HP-35 RPN
Technique: java-applet
Tested: Yes
HP-35 RPN
Emulates: HP-35 RPN
Technique: javascript
Tested: Yes
There is a downloadable version containing all required javascript code and image files.
HP-45
Emulates: HP-45
Technique: java
Tested: Yes
Excellent micro-code simulator. Includes debug view to see what is going on inside the HP-45.