I am wondering whether somebody has compiled a list of fields which are available for creating content types in Drupal. There are many lists of the most popular modules, but it would be great to have one focusing on existing fields, whether in core, or from third-party modules. I have looked around a bit, but always end up with lists of modules.
There is a page at admin/reports/fields that lists the field name (the machine name), the field type and which module it came from, along with all of the bundles (content types, in the case of nodes) that use that field.
For Drupal 7, if you have
drush, you can ask it for a list of "field types" (which includes their widgets), or "fields" (which includes the field name and its associated 'bundle').
The sample output (clean Drupal 7) for
drush field-info fields gives for me:
Field name Field type Bundles comment_body text_long comment_node_page,comment_node_article body text_with_summary page,article field_tags taxonomy_term_reference article field_image image article
The output for
drush field-info types gives:
Field type Default widget Widgets file file_generic file_generic image image_image image_image list_integer options_select options_select, options_buttons list_float options_select options_select, options_buttons list_text options_select options_select, options_buttons list_boolean options_buttons options_buttons, options_onoff number_integer number number number_decimal number number number_float number number taxonomy_term_referen options_select options_select, ce options_buttons, taxonomy_autocomplete text text_textfield text_textfield text_long text_textarea text_textarea text_with_summary text_textarea_with_sum text_textarea_with_summary mary
You could also install the "Devel" module, and use the "Development" Block. There's a menu link (devel/field/info) that shows a comprehensive list of all fields, instances, and bundles.
In Drupal 6, just go to admin/content/types/fields.