Check Book Money Manager 

A simple alternative to complex budget systems. There are no charts of accounts. Manage your money not your receipts. Determines if there is enough money to pay your future bills and finds surplus money to paydown debt. Tutorial included.
budget debt personal finance finances money

Universal Scientific Calculator 

Math Functions, factorization, financal, average, regression, factorial, dates, complexes, charts, units converter, ephemerids, Euler, Simson, gravitation. Fourier Series, Pi, Solar System, many games, Molar Mass, Taylor, Bernoulli, Gamma...
math functions factorization average regression factorial dates complexes charts units converter ephemerids euler