Bookmarklets for Opera
   Free tools for power surfing. Each tool is a small JavaScript application which you can bookmark directly from the page and use from your Bookmarks or Hotlist.
   http://www.philburns.com/bookmarklets.html

GreyMagic Security Advisory: Reading Any Local File in Opera
   Security vulnerability in Opera 6.01 and 6.02. Describes how a character entity can be used to upload an arbitrary local file to a remote server, without the user's knowledge.
   http://sec.greymagic.com/adv/gm001-op/

Joe's Slim Software
   Freeware programs by Josef W Segur, including OFE and O4FE, opera file explorers, also OpWic, an Opera windows controller.
   http://users.westelcom.com/jsegur/

My Opera
   Skins for Opera, forums, links, polls and daily comic.
   http://my.opera.com

Opera Bug Report Form
   Bugs found in any version on any platform can be reported here.
   https://bugs.opera.com/wizard/

Opera Public Mailing Lists
   Opera mailing lists.
   http://list.opera.com/mailman/listinfo/

Opera Show
   Information about making presentations for display in the web browser, including an online generator, and software download.
   http://my.opera.com/community/dev/operashow/

Opera Users FAQ
   An independent FAQ compiled from regular questions and answers posted to the Opera mailing list.
   http://www.hallvord.com/opera/

Opera Watch
   A blog covering the latest buzz on the Opera browser and its competition.
   http://operawatch.com/

Opera Web Browser Changelogs
   Changelogs for the Opera web browser.
   http://www.opera.com/docs/changelogs/

Opera Web Browser Knowledge Base
   Information to help you if you have a specific problem or a technical question about using Opera.
   http://www.opera.com/support/service/

Opera Web Browser WIKI
   A collection of information relating to tips, customization, and technical details of the Opera web browser
   http://nontroppo.org/wiki/Opera7

Opera Widgets
   Small desktop applications for those using the Opera browser. Categories include web tools, games, music and news. Also, can create own widget.
   http://widgets.opera.com/

Opera for Linux Browser FAQ
   Answers frequently asked questions regarding Opera for Linux. Many of the tips and tricks are applicable to all platforms, such as how to customize search queries and URL filtering.
   http://www.schrode.net/opera/tips/tips.html

Opera for Mobile
   Information and news about Opera's web browser for smartphones and PDAs.
   http://www.opera.com/products/mobile/

Opera for Symbian OS
   Information including FAQ sections, bug lists and reviews for Opera 5 and 3.62 for the Symbian platform.
   http://mobileopera.com/

Opera's search.ini illustrated
   Explains what all the entries in Opera's search.ini mean and how to add custom search engines.
   http://www.schrode.net/opera/search/search_ini.html

Quickshow
   A presentation authoring tool. The presentations are displayable with the Opera web browser in OperaShow mode.
   http://philburns.com/quickshow.html

Tutti all'opera (Away from the browsersaurii)
   Discussion and essays about the Opera browser.
   http://www.searchlores.org/tuttiope.htm