Not quite tools, but very useful for using tools - DIY LED lights

[mklotz]

Look to the medical trades if you suffer from fat-hands or manual clumsiness.

Forceps
Hemostats
Scalpels
Iris scissors
Suturing needle holder
Surgeon's pliers

Surgeons need to do precise tiny work with normal size hands. Their tools have evolved over centuries to address this need.

Small manipulators can be custom cut from bamboo skewers. I make tiny disposable spatulae for applying precise amounts of glue and grease by whittling the end to a flat. Make a forked end to hold tiny screws while starting them. Also good for electrical work since they're non-conductive.