Dod_Kittyhax - This map is Mobba's masterpiece. It has a great layout and beautiful artwork, even if I do say so myself.
dod_kittyhax.zip - Screenshot

Dod_Longhallway - Simple map featuring a long hallway with 3 trenches, great for bazooka wars.
dod_longhallway.zip - Screenshot

Dod_confusion - Short vision distance? Spikes? YES PLEASE!!!!
dod_confusion.zip -
Put this in your "SteamApps\email@domain.com\day of defeat\dod\sound\player" folder (Create it if it doesnt exist) to replace the helmet ping sound with an unreal tournament "Headshot!".
helmet_hit.wav

The latest version of one of my favourite hl_engine wallhacks, optimized for dod, VAC undetectable too.
Sex_Ray_B_156.zip

Although not perfect this is an extremely undetectable aimbot, it mimics the snapshot of a real player
Hedshot5.exe