The Nudge - A planner friend in your pocket.
Online-RSVP.com - Beautiful online RSVP for wedding & other events. Create an online invitation, track your guests responses.
Yuggler - Fun activities for kids and family!
RSVPify - A powerful and awesomely customizable platform for selling tickets online for your event.
Capture - A great free screen capture utility that allows you to capture either a window or the desktop and save it to either a file or the clipboard.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets