Here are some WordPress utilities, themes and plugins. These are all licensed under the GPLv2.0 according to the inherited license from WordPress.
Omega PGP Mailer
This plugin allows you to embed a contact form on any post/page using a shortcode. Visitors can use the plugin to submit secure messages to the WordPress site’s administrator. This uses `wp_mail` so it plays nice with custom delivery plugins.
Civique
This is a theme developed for the United Way of Albany County for non-profit organizations.