Ohhhhhh there are soooo many.hmmm
1)
www.freeconferencecall.com (I must use this every single day)
2)
www.xobni.com (one of my new finds...outlook email sorter)
3)
www.ooVoo.com (video chat conferencing)
4)
www.logmein.com (computer remote access)
5)
www.sendthisfile.com (sending large file)