Codon usage frequency (CUF) calculator of coding fasta sequences
RPNCalc - The command line Reverse Polish Notation (RPN) Calculator
A graphing calculator that's both powerful and easy to use.
PeCalc is a polyvalent engineering calculator for S&T students
Path of Exile trade helping tool
Simple and easy application to calculate resistivity
Fraction Calculator is a handy and reliable calculator.
Findout solar PV configuration for your home or office