1. htmlwidgets
   • < 1 yr old, very popular, maintained by Rstudio, used by Plotly
2. googleVis
   • Really cool but data and plot are hosted on their platform
3. rCharts
   • Predecessor to htmlwidgets
4. ggvis
   • ggplot2 authors, based on old javascript library

d3kit-timeline

• Kenton Russell - timelyportfolio
• Ramnath Vaidyanathan and RStudio for htmlwidgets
• Learn more at www.buildingwidgets.com