RecordSelect – a standalone plugin that integrates with Active Scaffold to provide a scalable “add from existing” option on subforms. Can also be used for form_ui = :record_select.
as_paperclip_bridge – Active Scaffold Bridge – bridge that integrates activescaffold with paperclip attachment plugin
Advanced Search – The name says it all. You must search on specific fields, support for different field types and different operators as well.
Bridges (now in core) ( Bridges integrate other into active scaffold )