Bootstrap Multiselect
Bootstrap Multiselect is a JQuery based plugin to provide an intuitive user interface for using select inputs with the multiple attribute present. Instead of a select a bootstrap button will be shown w dropdown menu containing the single options as checkboxes.
Bootstrap Multiselect is featured in an article on tutorialzine: 50 must-Have Plugins for Extending Twitter Bootstrap; on Bootsnipp's list of Twitter Bootstrap recourses; and available on NuGet: Bootstrap.Multiselect.
Documentation, Examples, FAQ and License: http://davidstutz.github.io/bootstrap-multiselect/.