Squarefree Bookmarklets  
   Information, resources, and several downloads.
   http://www.squarefree.com/bookmarklets/

Bookmarklets  
   Information on Bookmarklets and a collection for download.
   http://www.bookmarklets.com/

Creating Bookmarklets  
   JavaScript programming tutorial explaining how to create bookmarklets.
   http://www.webreference.com/js/column35/

Bookmarklets for Opera  
   Several downloads for the Opera Web browser.
   http://www.philburns.com/bookmarklets.html

Sam-I-Am.com: Bookmarklets  
   Sample tools for download.
   http://www.sam-i-am.com/work/bookmarklets/index.html

Creating a Bookmarklet  
   Basic introduction to utility browser scripts.
   http://javascript.about.com/library/weekly/aa101102a.htm

Jalarie: BookMarklets  
   Several samples and a bookmarklet editor.
   http://spruce.flint.umich.edu/~jalarie/jaa_kcd.htm

LibraryLookup  
   Tools for looking up catalog records from book-related sites.
   http://weblog.infoworld.com/udell/stories/2002/12/11/librarylookup.html

WhoisURL  
   Bookmarklet - WhoisURL, JavaScript favorite that popups a window with DNS/Whois/Nslookup info for current viewed URL.
   http://www.canufly.net/~georgegg/WhoisURL/getwhois.htm

Centricle: Favelets  
   Personal collection of bookmarklets for Web development and search engines.
   http://centricle.com/tools/favelets/

WorldTimZone Bookmarklets  
   A variety of bookmarklets including search engine, web development, and religion-related ones.
   http://www.worldtimzone.com/bookmarklets/

BookkooB Search  
   Searches a webpage for ISBNs and shows price details from UK or US online stores.
   http://www.bookkoob.net/bookmarklet.php