There are so many Web tools and resources available, it’s impossible to list them all. However, from an educational viewpoint, there are several very useful tools available. Perhaps one of the following might meet your needs or help you to be more creative or productive.
Aviary – online suite of creative applications – photo editing, music creator, audio editor and more
Diigo – collaborative research tool and social content site
Delicious - social bookmarking site
Doodle – easy scheduling, survey tool
Glogster – make an interactive poster
Google Docs – not only documents, but spreadsheets, presentations, drawings and forms, too
Google Groups – create and share with groups of people
Google – if you aren’t familiar with all of the Google apps, check out things like Picasa, Latitude, Earth, Maps, SketchUp, Blogger, Translate, Scholar, and many more.
paper.li - Paper.li is a content curation service. It enables people to publish newspapers based on topics they like and treat their readers to fresh news, daily.
Pinterest – virtual pinboard
WordPress – great blogging platform with lots of control and lots of features
Zotero – collect, organize, cite, and share your research sources
4 Free Conference Call – Mashable lists four free conference call services
PDF to Text converters
File Hosting/File Sending (share large files that are too big to email)
Dropbox (use Log in if you don't want to download the client software)
YouSendIt.com (14 day free trial)
PollEverywhere – instant audience feedback from the web, on Twitter, or texting on a cell phone (free for audiences of less than 30)