Juniper:
Juniper Сommit/Event/Import/OP Scripts
Juniper Source
Juniper Product Shots or Image Library
Olive for JNCIE
Olive is Alive
Building a Juniper "Olive" running latest JUNOS in VMWare
JuniperClue
Using QEMU with Olive to emulate Juniper Routers
Cisco:
Cisco Product Certificates
CCIE Hall of Fame
CCIE Hall of Fame II
Cisco IOS hints and tricks
Cisco MTU on switches
Cisco GBICs/SFPs
Blogs:
Cisco IOS hints and tricks by Ivan Pepelnjak
Jeff Doyle on IP Routing
Alexey Kipchatov
Daniel "dbg" Ginsburg
Петр Лопухов
Петр Лопухов #2 на IE Blog
Дима Литвинов