Стырил:

SEO for Firefox.

SEO for Firefox – Import useful marketing data right into Google and Yahoo search results.

Расширения:
  • AdSense Notifier – напоминалка, показывает сколько заработано на АдСенсе онлайн
  • ColorZilla – allows you to pull colors off a page
  • Firebug – edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.
  • Google Global – view regional search results from any country.
  • Greasemonkey – allows you to add many Greasemonkey scripts (like these) to your Firefox install
  • Inbound Link Quality Extension – extension by Bob Mutch estimating the authority of a page based on its number of .edu links, .gov links, and weather or not the page is listed in DMOZ or the Yahoo! Directory
  • LiveHTTPHeaders – allows you to view server header response
  • SEO Link Analysis Script – extend Yahoo! Site Explorer and Google Webmaster Central using this free script from Joost De Valk. It verifies the link is still on the page, adds PageRank scores, displays anchor text, and highlights if the link uses nofollow.
  • SearchStatus – highlights nofollow links, shows PageRank, shows Alexa rank, and provides links to some backlink information
  • Show IP – shows the IP address from which your Google search results are being delivered.
  • User Agent Switcher – allows you to act like you are GoogleBot or another search engine spider. Make sure you clear your cookies and browser cache before using this.
  • Web Developer – allows you to view a page with different browser configurations
Тулбары и букмарки:

Quick links and browser extensions which make it easy for you to access cool free SEO tools from anywhere on the web.

Google Gadgets

SEO Book Google Gadgets allow you to put link research, competitive research, and keyword research tools directly on any web page, or on your iGoogle page.

PS: Для тех кто только начинает обучаться с компьютером, рекомендую – самоучитель полезных программ. Доступно и интересно!

…а музыка была: В. Высоцкий – День Святого Никогда