GoogleWave

A wave is equal parts conversation and document. People can communicate and work together with richly formatted text, photos, videos, maps and more.

The product is part email, part twitter and part instant messaging. Users can drag files from the desktop to a discussion. Wave even showed character-by-character live typing.

It is a process of sharing images and other media in real time, improving spell-checking by understanding not just an individual word, but also the context of each word.

Any participant can reply anywhere in the message edit the content and add participants at any point in the process. Then playback sets anyone rewind the wave to see who said what and when.

But unfortunately wave has not seen the user adoption they (Google creators) would have liked. They didn’t have to continue developing wave as a standalone product.