FireMail allows you to easily send mass mails directly from your ExpressionEngine 2 control panel. It can track sent emails, import templates, use template tags in emails, send to mailing lists and batch send.
Developer is an accessory that allows you to quickly access the most essential sections of the control panel during site setup. It appears as a new tab in the control panel and is guaranteed to increase your productivity!!
Continuum is a real-time visitor tracking add-on that logs visits and other actions on your website, collecting data about each user and their navigation patterns which can be literally viewed in real-time, as well as viewed at any time in the future.
The Add-On Development Cheat Sheet is a freely downloadable cheat sheet and Accessory for ExpressionEngine 2.x. Its purpose is to help add-on developers get used to coding for EE2.x, speed up development time and increase productivity.