Links of interest from October 22, 2011 through October 24, 2011:

10+ .htaccess snippets to optimize your website
Mostly old standbys, but a few very handy snippets.
Screenfly by QuirkTools
Best-looking and most flexible tool I’ve seen for testing responsive web design on multiple devices/resolutions.
This Safari extension is amazingly useful, especially due to the fact that it’s so easy to toggle on and off. It provides customizable single-key shortcuts for a wide array of browsing activities. In combination with Vim Like or gleeBox, it’s nearly perfect.
List.js - Add search, sort and flexibility to plain HTML lists
Make plain HTML lists flexible, searchable, sortable and filterable with 7k of cross-browser JavaScript.
A bookmarklet to create the HTML5 cache manifest
A bookmarklet for creating the cache manifest required for HTML5 offline versions of sites.