The open-source notification infrastructure
Implementation of the OFTP2 protocol (RFC 5024)
Email Notifier For Windows
Contact form with SENDGRID email notification and PROOVL SMS alert
an 'auto-reply' bot for your mail server
Be aware of new message in your mailbox
Multiple account (or label) Gmail notifier (without storing passwords)
Multiple Mail Monitoring
MailChecker - The simplest way to check your multiple webmail accounts