I use the "Stickies" application for Mac more than anyone I know. At any given moment, I have at least 10 sticky notes open on my desktop — they're like virtual post-its for remembering everything from my mom's new email address to funny quotes from friends or the day's to-do list. Now, one web start-up is applying the post-it concept to web pages, too. Stickr is a web-based application used with Firefox to leave sticky notes on any website. You can keep them to yourself or share them with friends to comment on content, leave warnings, or just say hello! You can personalize each note with different fonts and colors and drag it around to any part of the screen before saving and sharing.