If you're looking for a way to share a website or collaborate over a web page with a friend but you don't want to install anything to do it, Channel.me can help. The service offers simultaneous browser sharing, real-time chat, and the ability to add notes and comments right on the page.
Channel.me works much like Google Docs: you can highlight text on a page, add comments and notes to different sections of a web page, and then chat with the other people in your shared browser session. You can both search the page in real time, and when one of you clicks a link or navigates forward or back, the other people in the session are notified before the action goes through. There are even Chrome and Firefox extensions you can install to start a sharing session from any web site without visiting Channel.me first.
The service is ideal for people who need to look at a website at the same time, but have never worked together or are on systems where they can't install new software. Channel.me only works for browser sessions, which makes it less feature-rich than QuickScreenShare, and much less effective than other, more robust remote support and control tools. However, it's completely free and doesn't require special software to work.