1. .customSelect()
http://adam.co/lab/jquery/customselect/
2. jQuery Selectric Selectric
3.
https://selectize.github.io/selectize.js/
4.
https://github.com/kvlsrg/jquery-custom-select
5.
6. nice-select.js
http://hernansartorio.com/jquery-nice-select/
7. tether-select
https://github.com/HubSpot/select
8. Custom Select
https://github.com/custom-select/custom-select
9. 그 밖에
https://www.learningjquery.com/2017/09/20-impressive-jquery-plugins-to-replace-the-html-select-box
9. 멀티셀렉트1
10. 멀티셀렉트2
https://simonwep.github.io/selection/