Drupal Core Fields
Drupal comes with a collection of fields that will handle most of your needs.
General
Boolean
A true/false value.
Comments
Comm...
Articles
Displaying referenced unpublished content
If you reference unpublished nodes, they will not be visible to anonymous users. If you want to show an unlinked title instead...
Checking field values
Many values can easily be referenced with $node->field_name->value.
But if this value is missing you'll get an error.
Use $node-...
Issues
Allow multiple ways to group fields in UI
Ideas for improving field grouping in the UI.
oEmbed field formatter creates wrong hash when leaving empty dimensions
Misconfiguring the oembed field display breaks it.
Add a tag select list in string Formatter
Enhance StringFormatter to allow selecting an html tag and whether to link to the content.
This is a change to a previous issue...
Drag and drop acts weird, sometimes not resetting the parent, or even clearing the region value
Dragging some field groups can break the form.
Modules
Field Display Kit
Configure field display, like labels per view mode.
Form Tips
Move description/help text into tooltips.
Physical
Physical dimension fields.
Weight field has an input mask.