MailChimp is my platform of choice for email marketing. Its drag-and-drop user interface makes setting up email campaigns quick and easy. Access is free for users with less than 2,000 email addresses on their list.
WinDirStat is a free and open source tool used to view which directories are taking up the most space on your computer. It has support for multiple disks and partitions. WinDirStat provides you with a list of the percentage of used space broken down by directory and a tree map for a visual representation of your files.