jQuery autocomplete tagging plug-in like StackOverflow's input tags? [closed]

What solutions accomplish the same auto-completion that SO uses for entering tags?

There are plugins that can handle one word but I haven't seen any that handle multiple words.

In order of activity, demos/examples available, and simplicity:

(demo) https://github.com/yairEO/tagify
(demo) https://github.com/aehlke/tag-it
(demo) http://ioncache.github.com/Tag-Handler/
(demo) http://textextjs.com/
(demo) https://github.com/webworka/Tagedit
(demo) https://github.com/documentcloud/visualsearch/
(demo) http://harvesthq.github.io/chosen/ (this isn't really a tagging plugin)
(demo?) http://bootstrap-tagsinput.github.io/bootstrap-tagsinput/examples/
(demo?) http://jcesar.artelogico.com/jquery-tagselector/
(demo?) http://remysharp.com/wp-content/uploads/2007/12/tagging.php
(demo?) http://pietschsoft.com/post/2011/09/09/Tag-Editor-Field-using-jQuery-similar-to-StackOverflow.aspx

https://meta.stackexchange.com/questions/100669/feedback-wanted-improved-tag-editor

Bootstrap: If you are using Bootstrap. This is a really good one: Select2

Also, TokenInput is an interesting one. First, it does not depend on jQuery-UI, second its config is very smooth.

The only issue I had it does not support free-tagging natively. So, I have to return the query-string back to client as a part of response JSON.

As @culithay mentioned in the comment, TokenInput supports a lot of features to customize. And highlight of some feature that the others don't have:

tokenLimit: The maximum number of results allowed to be selected by the user. Use null to allow unlimited selections
minChars: The minimum number of characters the user must enter before a search is performed.
queryParam: The name of the query param which you expect to contain the search term on the server-side

Thanks culithay for the input.

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