Bookmarklets are ‘smart bookmarks’, that will often automate a common procedure or enhance the current website with just a single click. Bookmarklets are used just like bookmarks; simply add them to your favorites and click on them like you would any other bookmark.
Countless bookmarklets are available online; some of which you may already be aware of like Firebug Lite. Marklets.com is a directory of bookmarklets that allow you to find latest, most popular, and highest rated bookmarklets.
You can browse by tags and search the bookmarklet directory based on keywords, write a comment or rate them. If you have developed a bookmarklets, make sure to add submit it to this unique directory.