metadata for nearly 1,000,000 public domain and Creative Commons images of more than 500,000 precise topics such as places, people and organism classifications linked to DBpedia and Freebase.

toolkit includes file to text (image, pdf, office docs), html to text, text to people, text to times (Chronic Ruby gem), geocoding, etc. tools are hosted, but you can self-host too. results aren't perfect, but interesting nonetheless.

high level language, generates SVG for the brwoser

collection of scrapers, plus online toolkit for building them

dataset publishing language

generates data in html, xml, csv, excel, or sql. has a good deal of flexibility. also, have to pay $20 to get over 200 items, and the max is 5000 (software is free, if you want to download and install it)

Tim O'Reilly editorial on open access to government data, with good links

graph/chart generator run by google