Gunz with glasses? No way! D:

Open Game Art - FREE/open source 2D, 3D art and music; check each license for details just in case, breakdown found here.
Artisteer - automatically create templates for your the most popular CMS sites; $129.95 standard edition

Added 4/26:
Dungeon Demon (Rusty Axe) - map editor; $29.99 with free upgrades forever or FREE using TrialPay
International Music Score Library Project - public domain music sheets for US & CAN (EU residents must check); MP3 audio, parts, and full score may be included