Useful open source plugins
CLNDR > https://github.com/kylestetz/CLNDR
Useful full page calendar solution,
Pikaday > https://github.com/dbushell/Pikaday
Plugin for calendar drop down in forms, it's not great but it does what it
is expected to do
Chosen > https://github.com/harvesthq/chosen/
Makes styling selects a lot easier and gives some cool options for more
complex select options
Slcik > https://github.com/kenwheeler/slick/
Awesome carousel tool, super easy to use and easy to style