Chalk is a calculator that tries to do right what others do wrong. It wants to prove that a "basic" software calculator can be as handy as a real desktop calculator (it's a shame that computers are still so bad as calculators). An non-exhaustive list of features is:

• Pretty print
• Complex, quaternions, matrices
• Arbitrary long integer and floats
• Uncertainty
• Primes, basic arithmetic
• Bit manipulation
• Grapher with predicates