Arora is a cross-platform open source web browser using the WebKit rendering engine, built on top of Qt. (GPL)

Camino is an open source web browser developed with a focus on providing the best possible experience for Mac OS X users. (MPL)

Chromium is the open-source project behind Google Chrome. (BSD)

Epiphany is the web browser for the GNOME desktop. Its goal is to be simple and easy to use. (GPL)

Flock is a web browser that integrates various blog, news aggregation, and social networking sites, and is built on the codebase of Mozilla Firefox . (MPL)

K-Meleon is an extremely fast, customizable, lightweight web browser for the Win32 (Windows) platform based on the Gecko layout engine from Mozilla. (GPL)

Konqueror is a web browser, file manager and file viewer for the KDE desktop. (GPL)

Midori is a web browser using WebKit as a rendering engine, as well as a gtk2 interface. (GPL)

The award-winning Web browser from Mozilla. (MPL)

rekonq is a KDE browser based on Webkit. Its implementation is going to embrace KDE technologies to have a full-featured KDE web browser. (GPL)