A few pictures may help to explain.

A traditional archer.


A modern recurve targetarcher using sights, stabilisers:


A compound archer:


Both modern recurve and compound bows can be used without sights, arrowrests, stabilisers, some of those, or other tools.

When the last two have nothing at all, they are called barebow, I believe it's even called barebow when it has the sight.

Tools for traditional bows are limited, and rules are confusing regarding when it is still traditional/legal for a competition.

I haven't seen a traditional bow using a stabiliser yet, nor magnifying/laser sights. They can have some sort of basic arrowsupport, a nockingpoint on the string to allow some reference for consistency, colors on the string to make stringwalking easier or partial thickening of the string to make barehanded drawing (and release) less of an ordeal. Not part of the bow really, but a thumbring (or any other [partial] glove to protect the drawing fingers and/or bowhand), armprotector and chestprotector can be used too.