Just discovered Timetric, another online data visualization/analysis company. They’re based in London and are focusing mostly on time series analysis (which is reflected in the name, of course). Timetric’s platform is pretty open, with good sharing/publishing/embedding functions and an API with client libraries for Python, Ruby and LabVIEW. There’s also a “formula language” for combining different time series using an Excel-like syntax. It’s fun to play around with the 140.000+ time series that they’ve made available, although the data seem rather Britain-centered at the moment.