zotero und flock gehen gut zusammen
XMLStarlet is a set of command line utilities (tools) which can be used to transform, query, validate, and edit XML documents and files using simple set of shell commands in similar way it is done for plain text files using UNIX grep, sed, awk, diff, patc
The Safari Microformats plugin notifies you when the author of the website has published Microformats and allows you to easily import hCards and hCalendars in Address Book and iCal
Scraper is a Google Chrome extension for getting data out of web pages and into spreadsheets.
A list of command line tools for manipulating structured text data
Datawrapper is a tool that enables to create enticing visualizations in seconds, without any programming skills. It draws inspiration from ManyEyes and GoogleCharts but remains entirely open-source and independent from a third-party server. Any developper can add a visualization type, using (or not) a JavaScript library like D3 or Raphael, and a specific theme.