Copynotes is the home to several websites:

Chord123

a tool that displays chords and scales for
guitar, piano and harp
Rhythm123

a music tool that can act as a metronome
or you can use for rhythm practice
Shift4Me

info about a DIY system to add to a bicycle
Oelbrandt

website about the musician: Oelbrandt
Sunclock

a tool that displays the amount of sun hours
on any date, any location on Earth
Webles

a planning tool for online classes