Calc98 Alternatives

Calc98

Calc98 is a small but very powerful scientific calculator, with lots of features:

Version 5.3 (totally free)

# RPN
# Base-n, hex, octal and binary modes
# Scientific/Engineering Functions
# Matrix/Array Functions
# Complex Numbers
# Statistical Functions
# Financial Functions
# Time functions (calculations, watch, countdown, etc)
# Angles (degrees, minutes, seconds)
# Roman numerals (!)
# Periodic Table of Elements (!!)
# Units Conversions
# Physical Properties and Constants
# Editing Properties, Units and Constants
# System Functions
# Miscellaneous Functions
# Keyboard Accelerator
# International Versions

Version 5.6 is cheap and has a lot of new functions:

# Better RPN logic and visible stack
# New modes for fractions and feet/inches
# IP address calculation mode
# Better financial functions
# New interactive financial rates dialog
# Customised calculator themes
# More data than ever, including new particle physics data
# Updated matrix and complex modes
etc.