Links
http://screencasters.heathenx.org/wp-content/videos/ep018/ep018.html
http://www.everaldo.com/crystal/ - Very cool, modern icons from everaldo.com (LGPL)
http://tango.freedesktop.org/Tango_Icon_Library - Tango Icon Gallery download
http://outlawdesignblog.com/2008/free-developer-icon-sets/
http://www.smashingmagazine.com/2008/05/21/40-professional-icon-sets-for-free-download/
http://de.fotolia.com/
http://www.fontyukle.com/en/ - TrueType fonts archive
http://downloads.outpost10f.com/font.html - DS9 fonts
http://visionwidget.com/toolz/4-design/315-hq-free-fonts.html
http://commons.wikimedia.org/wiki/Crystal_Clear
http://www.unitaglive.com/qrcode - QR Code Generator

Charts
http://code.google.com/intl/de-DE/apis/chart/image_charts.html