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There are a number of different JavaScript based toolkits, in addition to the Google Visualization and Charts APIs. I find Protovis (which SVG based) to be an excellent middle-ground between toolkits that are too low-level that they're laborous and painful to get going, and too high-level that every chart looks too similar. The JIT is a Canvas-based ...

Maybe this is what you need? What is the Google Chart API? The Google Chart API lets you dynamically generate charts with a URL string. You can embed these charts on your web page, or download the image for local or offline use.

I have created a solution for myself via Chrome Extension. Chrome Extension This is my first chrome extension, and this is not intended to publicize said extension. I may create Firefox and Safari versions at a later date, but as this is currently for my personal use and I use Chrome here it is. I will also include the code here for anyone interested in ...

See this thread on plotting map points from excel entries. This should allow you to take addresses from a file (eg spreadsheet) and plot them on a map. http://productforums.google.com/forum/#!topic/maps/baw9A5LuS3o http://batchgeo.com/ is an example from this list, it allows you to paste address-related cells to plot.

In terms of a "web app that comes closest to the sketch and or description", my first thought was Google Squared - but alas, it no longer exists (I thought it was an amazing innovation). But here's something to try: http://www.wolframalpha.com. Enter a search term such as mammals or presidents.

IBM Many Eyes might work for this. Many Eyes allows pure data in either text or table format to be uploaded and processed into multiple visualization formats. Hope this helps.

Well I did try all kinds of searches before asking here and came up with nothing. But I kept trying more searches after asking and I think I found exactly what I wanted, in fact the second kind I asked for: batchgeo Here's their input screen: And here's the map I made with it for an answer on another Stack Exchange site:

You can upload data from a speadsheet to Google Fusion Tables and there's examples to get started. Also try searching the google group for specific tips on creating a heat map.

I was about to suggest Swivel, but they went out of business. However, that article led me to Many Eyes. It looks like it's a product of IBM research that may fit your needs: On Many Eyes you can: View and discuss visualizations View and discuss data sets Create visualizations from existing data sets If you register, you can ...