Antigrain
This one is really good for understanding what is going on with font rasterization
http://www.antigrain.com/research/font_rasterization/index.html#FONT_RASTERIZATION
Steve Gibson's LCD Page
Very infomative site about LCD / subpixel rendering.
http://www.grc.com/cleartype.htm
Google Web Fonts
A Large Collection of Free Fonts
http://www.google.com/webfonts
Download: http://code.google.com/p/googlefontdirectory/ or http://joemaller.com/1856/download-google-fonts/
Truetype Hinted Inconsolata Fonts
Apparently there are a few different versions of Inconsolata, not all of which have TT instructions. I recommend using this version, and skipping the bold version. Autohint emboldening is better.
Page: http://code.google.com/p/googlefontdirectory/source/browse/inconsolata/
File: http://googlefontdirectory.googlecode.com/hg/inconsolata/Inconsolata-Regular.ttf
Microsoft Core Fonts
http://corefonts.sourceforge.net/
Vernon Adams
Designer of Free Web Fonts
http://code.newtypography.co.uk/
The Raster Tragedy
Definitive resource on rasterization and hinting
Various Webfont Sites (thanks to markser)
http://www.google.com/webfonts/preview
http://fontfonter.com/ (useful for previewing websites with a set of different web fonts, maybe a good testing ground?)
Programmer Fonts
http://keithdevens.com/wiki/ProgrammerFonts
http://www.proggyfonts.com/index.php?menu=download
http://www.codeproject.com/KB/work/FontSurvey.aspx
Convert bitmap fonts to embedded TTF fonts
http://www.ax86.net/2010/08/28/generate-your-own-ttf-versions-of-the-terminus-font
Infinality Rendering on Windows?
Keeping my eye on this one….
http://code.google.com/p/gdipp/issues/detail?id=204#makechanges