If you use Google Calendar and Gmail, you know it can be tricky to flip back and forth between the two to check your availability and schedule appointments. Boomerang Calendar (from the makers of previously mentioned Boomerang for Gmail) fixes all of that by turning any mention of a time or date in your Gmail messages into a link you can use to add an appointment to your calendar. The links are veen highlighted red, yellow, or green so you can see if you're busy at that time, have an adjacent appointment, or free. Best of all, it recognizes natural language, and even corrects for time zone. More »