Fieldtypes that start with the letter J, run on ExpressionEngine 1, run on ExpressionEngine 2, are Free and are sorted by Page Views (descending).
Allows you to display a dynamic category checkbox tree as a standalone fieldtype.
In addition to being damn sexy, this also allows you to use categories that are not formerly assigned to the channel.
Simple EE2 only URL fieldtype checking the validity (syntax / headers) of the entered URL. WIll not submit the entry if there is a problem with the submitted URL.
A simple fieldtype that makes it easy to add a currency to a field, for example, to add a "price" to a channel entry.
A fieldtype that shows the data of another fieldtype as read-only text.