NFOC - Netfrag conferencing 
NFOC consists of two different applications at the moment (heavy development state! ;). The one is the video capture/resize/reformat/compress/UDP-broadcast-application and the other one is the straightforward reciever and renderer for the stream caused by the sender.
Features/Sender:
-  Accepts RGB15/16/24/32, YV12/YUV12 and I420 capture formats,
 
-  Downscaling to any size (smaller than the original) and aspect, dithering to 8 bit RGB/YUV or 8, 4, 2 or 1 (hehe) bit grey scaled (needs milliseconds at my P3-500),
 
-  Digital zoom (zoom any area in the original frame in realtime),
 
-  Compressions: RLE (Run-length-encoding) and LZ (Lempel/Ziv) selectable,
 
-  UDP send: implements NFOC protocol, port definable.
 
Features/Sender:
-  Accepts and shows all the formats generated by the NFOC sender,
 
-  Stufftures like: Keeping image aspect, stay on top...,
 
-  Borderless and fast fullscreen mode w/o switching to any accelerator mode,
 
-  Decompressions: RLE (Run-length-encoding) and LZ (Lempel/Ziv) as selected at the sender application,
 
-  UDP recieve: implements NFOC protocol, port definable.
 
Only 
NFOCscreenshots from early versions are available at the moment. More is coming when i need it or when somebody is firing my ass for that =P
Contact me if you are heavily interested.