DroidCam - DroidCam – Use your Android phone as a wireless webcam or an IP Cam!
iVCam - iVCam transforms your Mobile Phone / Pad into a webcam for Windows PC.
Iriun Webcam - Use your phone's camera as a wireless webcam in your PC or Mac.
Webeecam Free -USB Web Camera - Webeecam records video from a USB camera connected to Android phone/tablet.
EpocCam - Turn your phone into a webcam
iCam - Remotely monitor multiple live video and audio webcam feeds from your iPhone, iPod touch, iPad or Android device over WiFi and EDGE/3G/4G/LTE.