Cisco Press & Knowledgenet Study Guides:

Knowledgenet CIPT1 v4.1 - Part 1
Knowledgenet CIPT2 v4.1
Knowledgenet CVOICE v4.2
Knowledgenet QOS v2.0
Knowledgenet GWGK v1.0
Knowledgenet IPTT v4.0

Testking & Pass4sure:

Pass4sure CVOICE v2.30
Pass4sure CIPT v2.16
Pass4sure GWGK v2.29
Pass4sure IPTT v2.12
Pass4sure QOS v2.35