PDF-XChange: Another light weight Adobe Reader alternative
PDF -XChange Viewer loads PDFs faster than Adobe Reader, which may be the only feature that matters to many users. But this free application also includes tools for editing, highlighting, or adding notes to PDF documents.
The application also has a useful snapshot tool for copying selected portions of a document to your clipboard, and a feature for attaching open documents to email messages. Considering PDF-XChange Viewer is just the free version in a set of commercial PDF creation tools from Tracker Software, it's amazing how many features this little application has. It might not be quite as fast or lightweight as Foxit or Sumatra, but comparing PDF-XChange Viewer to those applications is kind of like comparing a Swiss Army Knife to a spork.