Arbor – graph visualization library using web workers and jQuery.
Banana – visualize logs and time-stamped data stored in Solr. Port of Kibana.
Bokeh – A powerful Python interactive visualization library that targets modern web browsers for presentation, with the goal of providing elegant, concise construction of novel graphics in the style of D3.js, but also delivering this capability with high-performance interactivity over very large or streaming datasets.
Plot.ly – Easy-to-use web service that allows for rapid creation of complex charts, from heatmaps to histograms. Upload data to create and style charts with Plotly’s online spreadsheet. Fork others’ plots.
Redash – open-source platform to query and visualize data.