PLOTlet is a free, open-source tool to quickly create plots and charts. It lets you create charts and chart grids fast, process plots automatically via batch, align multiple graphs easily, and export them in high quality.
PLOTlet runs natively on Windows, on all Java platforms, and as Eclipse plugin.

Note: this is a very early version of PLOTlet; we would like to refine and minimize its syntax in the upcoming iterations, and add new diagram features.

Basic concept:
There are many tool to create plots and charts--the most popular one being Microsoft Excel. Excel, however, has some severe drawbacks:
- To change a diagram type, or diagram attributes, the user must often perform many repeating and time-consuming tasks involving popup windows, context menus etc.
- It is tricky to batch process the creation of graphs, as VBA is not really designed for such tasks.
- It is difficult to create grids of graphs, ie, many graphs of the same size. Especially as individual graphs are resized-- manually or automatically--they are tricky to keep in sync.