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Opera Web UI Toolkit
Repository of LGPL packages for Opera Desktop Browser
Contains the code of the Download Chrome Extension hosted at https://addons.opera.com which allows users to install extensions from Google Chrome Web Store directly in Opera browser
Standalone tool to convert an Opera (.oex) extension into an Opera 15+ (.nex) extension
A BB-8 controller built with web standards. Web Bluetooth API demo.
Opera Dragonfly is a fully featured development and debugging tool integrated into the Opera browser.
Fake web store — a Payment Request API demo
Repository for the Appear.in Pop extension
Handoff Appear.in sessions from your desktop to Android mobile web browser
Repository for the Appear.in Social extension
Talkback and Brailleback helpers for Opera Devices SDK for Android based on Chromevox.
Chromevox only export of Chrome accessibility suite (https://code.google.com/p/google-axs-chrome/).
Static backup for the Dev.Opera site as it was in February 2014.
A WebGL framework
Documentation of the core Opera Unite API and a handful of additional helper libraries. Please note that since April 2012 Opera Unite is no longer being developed or supported.
HTML5 port of the indie platform game Emberwind.
A handful of Opera Widgets utility libraries for use in Widget development.