Bookmarklets are small javascript scripts that can be saved as in a normal bookmark, you just have to drag & drop them in the bookmarks toolbar, either if you use Safari, Firefox or Opera.
Here’s a list of top 25 bookmarklets I found really,really useful.
Just drag them to your toolbar to start using them!
Windows and Tabs
Mac Apps
Retweet a page with Tweetie
Web Development
960 Gridder is an excellent tool for any web developer/ designer that wants to easily align, match and/or lay out websites.
SEO Browser is a fast, efficient, and comprehensive SEO analysis tool that can help you examine and understand the component parts of a Web page.
GmailThis! is an easy way to make a Gmail email without visiting mail.google.com. Once you add the GmailThis! link to your browser’s toolbar, emailing will be a snap.
Or rather, a click.
Just drag and drop the Google PageRank bookmarklet to your favorites bar and click on it whenever you want to check the PageRank of any given page.
Tiny URLs
Links
You can find many other bookmarklets here: