There are many, many to be found on the internet – the site marklets.com is a rather complete collection of around 1000 that you can use.
However, one of the most useful bookmarklet related sites is the Bookmarklet Combiner, which lets you generate your own Bookmarklet, consisting of links to others that you specify.
But, to save you the hassle of searching, here are 21 I’ve found to be the most useful. To use any of them, simply drag the name to your Bookmark list at the top of the browser.
If you wish to print a page, this lets you modify exactly what you want – turn off background printing and images, for instance. You can even mark which part of this screen requires printing. [Homepage]
4. Remove Bloat
This eliminates all occurrences of Flash, Java, music, and third-party iframes from a page. This can be particularly useful on those sites where browsing is reduced to a chore thanks to an over abundance of Flash animations!
Click on the BitLet Bookmarklet when you want to add a “download by bitlet” link near a torrent you want to download. [No longer available]
Many sites often free access, but only after signing up to an account. BugMeNot is a service that provides shared signins to popular sites, saving you the hassle of having to sign up first. [Homepage]
SuperGenPass uses a hash algorithm to transform a master password into unique, complex passwords for the Web sites you visit. And because it’s a bookmarklet it never stores or transmits your passwords. [Homepage]
Web Development & Design
12. WP Toolbar
Appends the default WordPress admin menu to whatever page you’re currently on (assuming you’re on a site that’s running WordPress) and styles it with CSS, fixing it to the top right corner. [Homepage]
Like Email This but uses your own Gmail account – a “Send” window appears with the site details pre-filled in. [Homepage]
Update: Removed Centricle.com links as the site no longer exists. Also removed SuperGenPass bookmarklet from page as it was causing it to break – please use the link to the homepage to use it instead.