Showcase and discover the latest work from top online portfolios by creative professionals across industries. https://www.behance.net
Dribbble
Dribbble is a community of designers answering that question each day. Web designers, graphic designers, illustrators, icon artists, typographers, logo designers, and other creative types share small screenshots (shots) that show their work, process, and current projects. https://dribbble.com
My Folio
MyFolio is a free art sharing network with many features which include art works like paintings, illustration and images useful for artists. http://myfolio.com/