1- jquery inline form validation
2- uniform
3- autotab
4- jquery niceforms
5- jquery form validator
6- toggle formtext plug-in
7- jquery field plug-in
8- in-field labels jquery plugin
9- jquery comment preview
10- input fields with images
11- pretty comments
12- jquery highlight plugin
13- select multiple form fields
14- password masking jquery plugin
15- jtip
16- password strength indicator and generator
17- live validation
18- jquery autosave
19- jquery dropdown checkbox
20- jquery ajax form builder
21- perfect signin dropdown box likes twitter with jquery
22- checking username availability with ajax using jquery
23- jqtransform
24- magicpreview plug-in
25- a fancy ajax contact form
26- ajax upload
27- current field highlighting in forms
（编译来源：梦想天空 原文来自：25+ jquery form plugins）