The Scheduler module allows you to create content at any time and scheduler it to automatically publish itself when you want it seen, and automatically unpublish itself when the content is no longer applicable. Handy!
What is Simplytest.me? In a word - Awesome! With Simplytest.me there is no need to install an entire site on your local machine (or worse, on a server) just to test out a module! You can quickly and easily spin up a site with your desired module, theme or distribution and play around without any overhead.
If you would like to allow anonymous users to create an account, create content, or comment on your site, but don't want to leave it vulnerable to spam, you'll need to install some form of spam protection. Mollom is a third party service that has plugins and integration with a variety of software including Drupal, Wordpress, .NET, Ruby and a number of other systems. One of its most useful features is that, regardless of the platform it is implemented on, it references a central repository of known spam, and everyone who uses it can contribute to and benefit from that central repository.
Backup and Migrate makes backing up and restoring your database easy. You can schedule automatic backups and It supports gzip, bzip and zip compression. The backup can be saved to your local machine, a private folder on the server or saved off-site to a service like Amazon S3 or NodeSquirrel. You can restore your site from a backup at any time, or restore the backup to a dev site for testing.
The Views Slideshow module can be used to create a slideshow of anything that can be displayed with Views. Such as an image slideshow or a recent content slideshow. This series will walk through some of the most common ways to setup slideshows.
The Pathauto, Sub-pathauto and Redirect modules can be used together to automatically create SEO and user-friendly URLs. Some site-builders are unsure about which module does what, and whether or not all three modules are needed. This series explains what each module does, and when it should be used.
The Workbench suite introduces huge improvements to the way content is managed in Drupal. It provides a single user interface for users who only need to work with content. That means no need to "learn Drupal". It allows you to set editor permissions based on your organizations structure, not your web site's. You can even create editorial workflows that allow users to create content, but not publish it, while other users may review content, and decide whether it needs an additional revision, or that it is ready to be published, and do so.