Mozilla

Firefox for desktop

Enhance your Firefox experience, get more out of the Web

Delicious remembers so you don't have to.

The diaspora* share widget lets you share your favorite links.

Facebook

Share any web page, anywhere, anytime.

Gmail

Send web pages and images to people using Gmail.

Google+

Share the web on Google+.

Known

Share interesting content from your own site.

LinkedIn

Share the web with your professional network.

mixi

Stay informed of what your friends are up to.

Odnoklassniki (Russian: Одноклассники Classmates) is a social network service for classmates and old friends.

Tumblr lets you effortlessly share anything.

Twitter Share lets you quickly tweet links to your followers.

VK

VK is a social network that unites people all over the world and helps them communicate comfortably and promptly.

Share your interesting news anytime, anywhere.

XING is the professional network for a better working life.

Quickly send web pages to yourself and others with enhanced link previews and more.