Portable Webcam is a handy tool to open your webcam easily and quickly. Its portable software and 1 file only. You can take photos with 1 click only.
How to use:
Just open the software, your webcam will open automatically.
Does exactly what it says. One suggested enhancement: have it honour the specified working directory, or allow a parameter or configuration option to choose where it defaults to saving the pictures to. At the moment, it always saves to "My Documents".
Very simple, lightweight tool. Great for just checking functionality, and pranking my friends by using UltraVNC (like teamviewer) to video my computer remotely. The picture feature is fine too, I can use heavier, laggier programs for videos.
If all you need is to take still pictures with your webcam, this program could work for you. The program is very basic. It downloads as a zip file and the fully functional executable file is right inside. No need to install or copy a huge program directory (full of only god knows what). When you run the program, it fires up the webcam and displays it. The only options you have are to capture a picture (not a movie), click a help button that only brings up an "about this program" screen and to exit.