In no particular order there is:
Brian May replica treble booster. (made for a friend).
Peizo buffer/mixer for acoustic guitar.
Fuzz face clone made in a bean can (brothers Christmas present).
Portable stereo speakers made in a bean can (sisters Christmas present).
An unfinished gain clone Hi-Fi amp.
Home-made watchmaker style lathe (made by my dad mostly).
4 string diddly-bo made from my favourite old pan, an old axe handle and part of an orange crate.
A do-hickey to charge a capacitor to 400v with an led voltage read-out for a coil gun that never got finished.