event bus:
vert.x

Visual:

highchart.js
chart.js (http://www.chartjs.org/)

d3.js (http://d3js.org/, frameworks/io/DOM)

http://www.jstat.org/ (https://github.com/jstat/jstat)

Web/Simple

http://cujojs.com/
AOP for cujo:
https://github.com/cujojs/meld

IO/Async

Q:
http://documentup.com/kriskowal/q/
https://github.com/kriskowal/q