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Knowledge:
WWW Computer Architecture
Who's who in Computer Architecture

Tools:
SimpleScalar A basic out-order simulator for researchers [Runscript]
M-SIM SMT & CMP simulator with special capability
SESC
A fast architectural simulator for CMPs [SESC Introduction] [Lab Instruction]
CACTI
HP lab product for analyzing power consumption of memory
MARSSX86 A full system simulator for x86-based architecture

Benchmarks:
SPLASH-2
PARSEC
NPB2
SPEC2006

Conferences:
Conference list
Upcoming conferences
Pretigious VLSI Conference Acceptance Rates

Advices for researchers:
Advice collection