• Better, Stronger, Safer jQuerify Bookmarklet » Learning jQuery - Tips, Techniques, Tutorials
  when you're on a page in which you want to play around with jQuery in the console, just click the bookmarklet.
  in Public bookmarks with bookmarklet javascript jquery playground
• Linear Gradients
  Some playground/sandboxes for CSS CSS3 * Linear Gradients * Radial Gradients * Text Shadow * Box Shadow * Text Stroke
  in Public bookmarks with css css3 gradient playground preview shodow stroke
• Updated jQuery Bookmarklet » Learning jQuery - Tips, Techniques, Tutorials
  when you're on a page in which you want to play around with jQuery in the console, just click the bookmarklet.
  in Public bookmarks with bookmarklet javascript jquery playground
• Yahoo! Query Language - YDN
  The Yahoo! Query Language is an expressive SQL-like language that lets you query, filter, and join data across Web services. With YQL, apps run faster with fewer lines of code and a smaller network footprint.
  in Public bookmarks with api console online playground tester webdev yahoo yql

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