Webcamoid is a multi-platform camera capture app focused on providing all major features required by power users with a very simple and intuitive interface.
Features
Cross-platform (GNU/Linux, Mac, Windows, Android and FreeBSD)
Take pictures and record videos with your camera.
Add funny video effects.
Translated to many languages.
Use pictures and videos as sources.
Screen capture support.
Many video recording formats.
Virtual camera support for feeding other programs (GNU/Linux, Mac, Windows)