Add ons, plugins and tools

Some relevant and useful additions:

SASS-stylesheets – for even more pretty styled forms in all browsers (mixins for different form layouts, etc.)
http://github.com/activestylus/formtastic-sass

TextMate-bundle for Formtastic:
http://github.com/grimen/formtastic_tmbundle

In-place editor for Formtastic:
http://github.com/rubymood/jintastic

ValidationReflection – for auto detecting :required options in inputs fields by checking the validations on the model (only required with Rails 2)
http://github.com/redinger/validation_reflection

ClientSideValidations-Formtastic the Formtastic plugin for ClientSideValidations:
https://github.com/dockyard/client_side_validations-formtastic

Formtastic jRails Autocomplete – An input plugin for Formtastic to render autocomplete fields automagically using jQuery:
https://github.com/faulkner/formtastic_jrails_autocomplete

E9s – i18n additions: http://github.com/archan937/e9s

Formtastic Without ActiveRecord – A guide to using Formtastic on forms that don’t have an ActiveRecord/ActiveModel model: http://dondoh.tumblr.com/post/4142258573/formtastic-without-activerecord

Formtastic With Twitter Bootstrap – A gem that generates Twitter Bootstrap-friendly HTML using Formtastic.
https://github.com/mjbellantoni/formtastic-bootstrap

Pwdcalc – A gem to create password field/-strength meter combinations:
https://github.com/trimentor/pwdcalc

formtastic_image – An input plugin for formtastic to render file fields with an image preview for paperclip attachments:
https://github.com/elandesign/formtastic_image

canvas to image – An input plugin to use a canvas for drawings (mostly autographs). the drawing will be submitted to the server
Link to Gist