WordPress is a widely used and highly extensible blogging plattform and web content management system. It provides customizeable themes, and over 30000 community-contributed plugins, is easy to configure and provides extensive documentation and howtos. WordPress can be used in a multi-user setup as well, repurposed as online shop or multimedia hosting, provides search enginge optimization, RSS/Atom news feeds, track- and pingbacks, link management, various formatting filters, and a built-in blog
Picha is a simple tool to download images from photo blogs. It currently supports extraction from Tumblr.