This week we begin a new way to show the best sites, we're categorizing them, because a lot of users asked me why I've chosen those sites. So I decide to divide and list the best sites I saw in the past week, split them and put each one under a category name. But feel free to give me some advice on new categories or some site to be featured in the next list!

DESIGN / CSS

Celsias - www.celsias.com

Celsias is the world's leading action-based climate change website. Enable Celsias members to combat climate change by learning, committing to action, and engaging with people, organizations and projects.

FLASH SITE

The Hejz - www.hejz.com

The Hejz is as a showcase for Peter Jaworowski, co-owner of Warsaw based studio Ars Thanea, lead designer and illustrator.

COMMUNITY

Si-MI - www.si-mi.com

Si-Mi.com is a digital media platform for users to upload, share and sell their content. On Si-Mi, users can set their price and keep 70% of the net proceeds. All content can be voted on by the Si-Mi community in a social networking environment so that the most popular content is promoted to the front page for millions of visitors to see (and buy!).

WEB APP

Planzone - www.planzone.com

Planzones are online workspaces that are secure and private. You and your team can meet there anytime to get work done. Planzone is designed to help you focus on what's important and succeed at what you do. Planzone is where teamwork begins™.

PORTFOLIO

delrancho - http://www.delrancho.org

Ricardo Villavicencio AKA delRancho is Designer from Santiago de Chile