The Adroit Synthesis Toolkit is a subset of LSSP XL, it includes the following modules.
AHR Generator: A West Coast style envelope/function generator
CV Watcher: A visualization tool for examining up to five CVs changing over time
Dual VCA: Two VCAs with an inverter, mixer and some neat wiring normalization (new)
MIDI Compensator: A utility for solving latency problems by delaying MIDI signals
MIDI Drum Kit: A six-channel router for triggering MIDI drums
MIDI Panic: A utility for solving hanging note problems (also available for free)
MIDI Patch: A utility for sending MIDI Bank Select and Program Change messages
Named Multiple: A multi-purpose utility that's very useful in large patches
Note Watcher: A visualization tool that displays notes on a keyboard graphic
Skin Module: A module that allows you to customize the backgrounds of Adroit modules (new)
If you've already purchased any of these modules then you should see an automatically discounted price for the upgrade to the full bundle.