The Data Visualisation Catalogue - Reference tool for data visualisation
Flourish - Powerful, beautiful, easy data visualisation
Visualoop - Dribbble for infographic & data visualization artists
nivo - nivo provides a rich set of dataviz components
Datamatic.io - Datamatic - WordPress for data visualizations
Tableau - Tableau can help anyone see and understand their data. Connect to almost any database, drag and drop to create visualizations, and share with a click.