Mailinator - Any Inbox. Any Time.

Clara - Clara is a virtual employee that schedules your meetings, getting you to the work that matters, faster.

Guerrilla Mail - Guerrilla Mail is a web-based app that provides a disposable and anonymous email address. Users of the service are not required to set up an account in order to send or receive emails.

Mia - Virtual assistant for meetings

Spamgourmet - spamgourmet provides email addresses that get created automatically the first time they are used, forward messages, and then automatically expire.

Mastermind Manager - Software for running mastermind groups