The chrome extension, mobile and web-app are open source under GNU General public licence.

Chrome extension licences

jquery and jqueryui MIT licence
jquery cookie MIT licence
jquery grumble.js DWYW licence (I was here)
jquery zoomooz MIT licence (I was here)
jquery qtip2 MIT Licence
dialog-polyfill Licence (I was here)
tablesorter MIT Licence
chosen MIT Licence
D3 visualization BSD Licence
plottable charting MIT Licence (I was here)
saveSvgAsPng MIT Licence
bsmSelect MIT Licence
select2 MIT Licence
trello 3000 MIT licence *was a starting point, no longer shares relevant code.

Mobile and web-app licences

Libraries (native mobile & web-app):
jquery and jquery mobile MIT licence
fastclick MIT licence
lz-string WTFPL licence
pagedown MIT licence

Plugins (native mobile app):

Webintent v1.0.0 MIT licence
Local-notifications v0.8.4 Apache License Version 2.0 (I was here)
App-event v1.2.0 Apache License Version 2.0
Custom URL scheme v4.2.0 MIT licence
Toast v2.5.2 MIT licence
InAppBrowser v1.6.1 Apache License Version 2.0
StatusBar v2.2.1 Apache License Version 2.0
AppVersion v0.1.9 MIT licence
Focus v0.1.3 Apache License Version 2.0 (I was here)
Datepicker v0.9.3 MIT Licence
Whitelist v1.3.1 Apache License Version 2.0