Heatmap tool
Handy tool to aggregate and visualize time series data. Generate print quality heatmaps in seconds.
Gradient generator
A handy color gradient generator for use in visualisations and other contexts.
Experimental chart
Try this innovative chart, aimed at time series data with three variables.
Free tools!
All tools on this site are free to use, but I'd be happy if you would give med some credit by mentioning or linking to the site.