Hi Wackyvorlon,

This really depends a lot on what type of things you do with Max. Some essentials on my list are:

- Sarcduino (straightforward way to read all inputs on Arduino boards into max at a stable sample rate.)

- FTM. Ircam's awesome library from the iMTR group. Allows for matrix operations, named objects and variable and a lot of other goodies.

- Soundhack externals. Very cool effects that make any msp chain sound great.

- CNMAT everything. Great collection of objects, particularly useful for FFT stuff and advanced OSC routing.

- BACH. If you write score-based music this is a must have. You can explore ideas and do procedural material generation very quickly.

All best

- Miguel