The Back to Mail promotion running right now has some great plugins for Mail.app users. I always come back to Apple Mail after trying the other (admittedly great) apps on the market. The two reasons for that are overall system integration (AppleScript, mostly) and the plugins that are available. Pretty much every plugin I’ve used and loved is on sale for 50% off, thanks to this promo.
This is a companion discussion topic for the original entry at https://brettterpstra.com/2012/09/04/a-few-gems-for-mail-app-50-off