This looks potentially interesting. I use R for analysis and plotting graphs as a rule but this might be handy for quick plots.

Very interesting discussion of Edward Tufte's rarely-used 'slopegraphs'.

This looks like it would be very handy at times: just paste in date (or upload a CSV, XLS or TSV file), change the format of individual cells and it applies those changes intelligently to all the other rows. At the end, it cleans up the file and lets you submit an email address to get the new file sent to.

Interesting sightings of pixel or block based infographics which are substitutes for pie charts. I don't think I've seen any of these in UK media yet. I'm no fan of pie charts, but I'm not sure these are a great improvement.