Chaos reigns on web-based services if you let domain names, SSL certificates or other key infrastructure expire. certalert.me is a service that warns you if a company-owned domain or SSL certificate is about to reach its due date.
Mac: Pomodorable is the perfect Pomodoro timer and to-do tracker. It uses visual cues to keep you organised and on track, and integrates completely with Reminders in OS X Mountain Lion. Change a to-do in Pomodorable, and it’s immediately synced to Reminders.
Nudgemail is the clever service that redelivers emails you send it as a reminder. Now it’s doubly helpful to send NudgeMail your follow-up-needed items, as it can add those emails to your Google Calendar.