I have an amp tool marked "AMP Service tool I" which will generally work for the larger sizes. It won't work for the JST type connectors. The hand tools typically have a "wire crimp"and an "insulation crimp" area.
EDIT: Here's
https://www.tedss.com/2099000910 the tool, but it looks like it's discontinued. It was such a nice tool. I purchased on like it years ago for like $20 for work. The price significantly went up a few years ago when I purchased one for home.
I did have to use some "valve grinding compound" to loosen up the jaws, but after that, it was fine.
I got a tool to do the really small crimps and they are difficult to use.
At work, we had a ratchet crimper for the 0.100" header type (Berg) connectors. Useful because the terminal was inserted into the crimper and then the wire.
I have a few crimper's at home. e.g. RJ45, Hex, AMP RJ45, RJ11, RG6/RG59 Compression, insulated terminals (ratchet), non-insulated terminals, the AMP crimper and a couple of smaller ones.
I used a lot of the plastic CPC connectors at work because the terminals were easily removed and reconfigurable/re-useable.
D-sub miniature was used too. Now, I can't find the hoods I used to use. They had quick release latches and were not compatible with the connectors with screws.