Most of CCK has moved to core in the Drupal 7/8/9 versions.

Please note that this is not the place to get support for D7 Fields! We are getting a number of support requests, bug reports, and even feature requests for D7 fields. Fields are in core in D7, you must file issues there, not here.

Replaces fieldgroup with much more awesomeness than in D6!

… or Features, which supports exporting and importing content types and fields in "feature" modules, or Field Tools replace content_copy.