Whois-record (site owner) lookup of the actual web site with networktools.nl.
2. Internet Archive
Archive lookup of the actual web site with archive.org.
Following two bookmarklets show a cached version of the actual web site. Useful for temporary offline sites.
The service Coral is specialised on this function:
Copyscape provides a free plagiarism checker for finding copies of a web pages online.
ImgOps The Image operations meta-tool also has a bookmarklet.
6. Print and PDF
PrintFriendly's bookmarklet cleans and formats web pages for printing and creates PDFs. You can try its funtionality by clicking on the PRINT/PDF button in the right upper corner here on this web page.