Autogrow textarea
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Depends on Autogrow by Chrys Bader.
You might also want to check default inputs demo.
Ajax File Upload
Fileupload which uses Ajax File Upload plugin.
For security reasons after uploading this demo only display file size and name.
Masked Input
Depends on Masked Input by Josh Bush.
Time Picker
Depends on Timepicker by Jason Huck.
Time Picker 2
Similar as previous but without dependenices. See how to create inputs tutorial.
Character counter
Using character counter.