This is where you'll be able to find tools for use with Zombie Panic Source or Team Fortress 2. README.txt files included in each archive.

Terms of Use:
Thank you for respecting my wishes, and enjoy. :)
ZPS: Improved Hammer Editor FGDVERSION: V1.02
ZPS: Improved Hammer Editor FGD
An UNOFFICIAL set of icons, sprites, and FGD modifications for use with Zombie Panic! Source. Improves appearance of several entities, including but not limited to random_ammo, random_any, point_teleport, etc, and provides two new sprite icons for use with human and zombie objective goals.

Updated: v1.01 Added info_beacon, info_no_dynamic_shadow, and info_objective_list icons, tweaked default HDR settings for env_sprite, light, light_environment, point_spotlight, tweaked default vertex lighting setting for prop_static

Updated: v1.02 - Added reskins of spawn locations, add

Download size ~650kb.
Screenshot #1
Download ZPS: Improved Hammer Editor FGDClick for README