Sidekick64 is a versatile software-defined cartridge for the C64, C128, C16, Plus/4 and VIC20. It uses a Raspberry Pi 3A+/3B+/Zero2 to emulate memory expansions, sound devices, freezers, and many other things. Recent additions are: a MOD/YM/WAVpPlayer (up to 48kHz stereo with dual SID-setups), improved low-latency HDMI-audio output for SID-/FM-/MIDI-emulation, added YM3526/OPL sample playing emulation, more configurability (TFT logos), and a bunch of minor improvements.