Complex sentence: The most common types of non-locking tremolos are the "Synchronized Tremolo" type and an almost endless stream of copies and also the Bigsby type although that type has largely fallen out of favour.
Split into simpler sentences: The most common types of non-locking tremolos are the "Synchronized Tremolo" type and an almost endless stream of copies. The Bigsby tremolo bar is another option, although that type has largely fallen out of favour.