This is the time of year that a lot of people are getting engaged or deep in the throes of planning their weddings. Although I'm pretty far from the isle, I still think that these tools are a great way to ensure that any event - large or small - is manageable. Hack your wedding (or party or shower)!
Hack #1: No more trying to diagram your seating chart in MS Paint - Simple Seating lets you arrange and rearrange your seating for one event of up to 50 guests at no cost. [edit: perfect table plan is also a great alternative]
Hack #2: Help your guests get from the hotel to the ceremony to the reception in addition to mapping out local attractions with Wedding Mapper.
Hack #3: Create your own professionally designed website with Open Source Web Design [via Lifehacker]
Hack #4: Organize your contacts, lists, photos and more with a personal wiki or free software like backpackit.