pendel
Get the time difference between two date strings or two time strings.
pendulumjs
A mesmerizing pendulum spinner for your users to watch while they're hanging
wishwash
Wishwash takes 4 arguments: a value (usually an iterator), a min, a max, and an inclusive qualifier, and counts back and forth between the min and max to your value. Wishwash can be likened to the modulus operator but instead of being used as a single dir