Buffer Button
689 websites

Buffer Button is free to use

http://bufferapp.com/extras/button

Buffer Button. Add this button to your website or blog to let people share your content on Twitter and Facebook seamlessly. They can share right away or at a ...

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Cover It Live
125 websites

Cover It Live offers both free and paid options

http://www.coveritlive.com/

CoveritLive.com is a web based Live Blogging tool that allows you to broadcast live commentary to your readers.

Market Share by Top Websites

1 Buffer Button is leading in The Entire Web.

2 Cover It Live is leading in Top 100K Sites.

Websites Categories

1 Buffer Button has better usage coverage in more websites categories. Including Computers Electronics & Technology, Science & Education, Business & Consumer Services, Health and 18 other categories.

2 Cover It Live is leading in Arts & Entertainment.

Geography

1 Buffer Button is leading in most countries, including United States, Italy, Spain, India and 63 other countries.

2 Cover It Live is leading in Greece, Bolivia, Ghana, New Zealand and 3 other countries.