DX Manager is a graphical editor and patch manager for classic Yamaha FM synthesisers such as the DX7.
DXM3 is the current release of DX Manager. It adds new support for 4-Operator FM synths such as the TX81Z and DX100.
SY Manager is the only full-featured graphical editor and librarian for the Yamaha SY77/SY99 synthesisers.
SYM3 supports most patch types including voice, multi, pan, microtuning and system setup.