Webcamoid is a full featured and multiplatform webcam suite.
Webcamoid vs Cheese opinions
This would be the qt equivalent of cheese.
It doesn't appear to have photo booth type capabilities.
It has no framerate drop glitches as cheese does. Also the image it produces is more bright and sharp in my opinion.
guvcview is a video viewer and capture software for the linux UVC driver. It is based in luvcview (http://mxhaard.free.fr), but all controls are done with GTK, allowing for a more user friendly GUI.
GTK+ UVC Viewer vs Cheese opinions
QtCAM is free open source linux camera application provide an easier user interface for both capturing and viewing video. It would also work with any V4L2 compatible device.
QtCAM vs Cheese opinions
In cheese the FPS is not displayed whereas qtcam display that, Also the image control settings have only 4 settings and qtcam have 10+, colorspace switching is also not possible in cheese
wxCam is a webcam application for linux. It supports video recording (in an avi uncompressed and Xvid format), snapshot taking, and some special commands for philips webcams, so you can also use the program for astronomy purposes.