LEGO ReBrick (formerly LEGO Octopus) is a social media platform by LEGO where users 13 and older can share and discuss user-created LEGO content online. It is a public stage for LEGO fans to share their models and creations with the general public. It is found here. It was released to the public on December 15, 2011.
The LEGO Octopus login page.