http://www.chordmelody.com
http://www.guitarforbeginners.com
http://www.wholenote.com
http://www.guitar.com
http://www.guitarsite.com
Tuner software for the PC:
http://download.cnet.com/downloads/0-10054-100-899672.html?tag=st.dl.10001-103-1.lst-7-1.899672
I return after 33 years.