Kovid Goyal just posted the weekly update for calibre, and it includes a surprise.
Alongside the list of big fixes, tweaks, and new features, there’s a quiet mention of a new website. He’s started a site to catalog sources of DRM-free ebooks.
Note that these aren’t ebooks that you can download for free. Some sources will be commercial ebookstores. The point of this new site is that it will help you find ebooks that you know for sure can be converted and loaded on to your eReader.
You can find the site here: drmfree.calibre-ebook.com
FYI: Calibre is free app that will help you convert eBooks and transfer them to your eReader. It supports a wide variety of eBook formats and just about every eReader on the market.