Opera Dragonfly

• dragonfly: Opera Dragonfly is a fully featured development and debugging tool integrated into the Opera browser.
• dragonkeeper: Dragonkeeper is a standalone proxy to support Opera Dragonfly development. Dragonkeeper translates STP (Scope Transport Protocol) to HTTP.
• dragonfly-build-tools: Tools to build Opera Dragonfly.
• dragonfly-documentation: Documentation for Opera Dragonfly.
• dragonfly-manual-test-suite: Manual test suite for Opera Dragonfly.

Test automation

• operadriver: OperaDriver is a vendor-supported WebDriver implementation that enables programmatic automation of different Opera products. It is a part of the Selenium project.

Web Standards demos

• shinydemos: Shiny Demos is a growing set of demos of the latest Open Web Standards.
• emberwind: Emberwind is an HTML port of the indie platform game Emberwind.
• Odin: Odin is a demo created to showcase what you can do with WebGL.

Browser JS

• browserjs: Browser JavaScript allows Opera Software to automatically fix incompatible web pages, out of date scripts, and pages that inadvertently block Opera.

Tools

• robohydra: RoboHydra is a testing tool for HTTP-based-API clients.
• flipcss: FlipCSS is a library to create right-to-left (RTL) CSS from left-to-right (LTR) CSS, and vice versa.
• ucss: ucss allows you to easily find unused CSS selectors and duplicate selectors, and count how many times a selector has been used.
• django-feeds: Django Feeds provides an extensive database model for RSS feeds and a fault tolerant parser.
• jsunzip: JSUnzip is a JS port of Jørgen Ibsen's tiny inflate library and some additional code for reading a zip archive.
• TextureAtlas: TextureAtlas is a script to easily generate texture atlases.

Opera Link hooks

• JavaOperaLinkClient: Java library to access the Opera Link API, compatible with Android.
• pyoperalink: Python package to access the Opera Link API.
• xmarks-importer: Simple Xmarks importer for Opera Link, using the Opera Link API.
• AndroidNotes: Sample Android application to manage notes using the Opera Link API.
• PhpOperaLink: Sample PHP Opera Link API application.
• perl5-net-operalink: Net::OperaLink, Perl interface to the Opera Link API.