Cycling74
The max/msp/jitter web site.
Max Objects Database
This site is designed to find objects, patches, applications, etc… from Max universe (Max/MSP, Jitter,…).
The Max ToolBox is a tool that simplifies some patching within the Max/MSP environment, for example it allows you to quickly connect objects using keyboard shortcuts.
Miller Puckette is one of the original max developers and initiator/developer of Pd. Pd is a lot like Max and available for linux as well. You will find here Pd versions and a link to download max/msp objects.
Open Sound Control
OSC is a protocol for communication among computers, sound synthesizers, and other multimedia devices.
Akustische Kunst
Olaf Matthes his max/msp objects. Also fiddle~ and bonk~ for intel mac and windows.
Ted Appel’s site
fiddle~, bonk~, centroid~ and paf~.
Tristan Jehan’s site
a.o. analyzer~, pitch~, loundness~, brightness~ and beat~.