Create triggers to share data or information between various web services.
“If this then that” is a fabulous web automation service where you create simple “recipes” of what triggers any following action automatically. There are lot of services available that you can link together using the service. e.g. you can create a trigger that whenever u create bookmark on delicious, then it gets tweeted; or if you favorite a video on youtube it gets posted on facebook; or when you post a picture on flickr it gets saved in your dropbox etc.
There are loads of services compatible with it from flickr, instagram, gmail, google calendar, evernote, readitlater, last.fm, youtube, facebook, twitter, gtalk, craigslist, linked.in, stocks, weather, tumblr, foursquare and many many more. You can quickly sign up and start creating your own recipes or formulas, as well as recipes created by others. You can start browsing them and find huge library of interesting automations that you can configure for yourself, creating the perfect synergy of services you always wanted.
Try it out @ ifttt.com