The htmLawed module enables the use of the htmLawed(X)HTML filter/purifier with text/input formats.

This module lets you use very fine grained html filtering.

See /docs/common-htmlawed-settings for common settings.

Rabbit Hole is a module that adds the ability to control what should happen when an entity is being viewed at its own page.

Also see Internal Nodes

This modules provides a widget called Multiple Selects list for reference and list types fields.

Date Popup Authored provides a jQuery UI datepicker for the Authored on date field found on node submission forms.

The description at Drupal.org describes this module the best:"This module creates separate "Edit account" and "Edit profile" tabs for each user, with custom user fields configured under "Edit profile."

"IP Geolocation Views & Maps (IPGV&M) makes it easy to create Views-based mapping solutions using the map renderer of your choice (Google, OpenLayers or Leaflet)..."

Create administrative panes that can be injected just about anywhere.

This is a really easy way to manage taxonomy terms and vocabularies.

Edit all items in a menu in one place.

Here are some examples of using Drupal's states API. It shows the use of OR and XOR (which only work with jQuery 1.8 or above, apparently). More examples can be found in the examples project in the form example module.