Online tools, calculators ranging from networking (ipv4, binary) to financial.(mortgage, interest)

An online tool that calculates the perimeter of a parallelogram.

3.8

An online tool that calculates Surface Area of a Cylinder

3.9

An online tool that calculates Surface Area of a Cylinder

3.4

A tool that randomly picks a color from a list, red orange yellow green and blue.

3.7