Compilation
A bunch of Marathon players took 54 of their favorite small maps, edited them a bit to their liking (more ammo, lower ledges in some cases, etc.), and stuffed them into a single Map file, to make net play easier. Unfortunately, the documentation is a bit sparse... (hard to tell which map comes from where, or what was done to it). If you're looking for a large collection of maps that someone else has already said is above average, download this.
Levels in map "Netmaps Compilation":
Above It All
Abuse Me!
Ace of Clubs
Acid Jazz
A Clean, Well-Lit Place
All Too Easy
Are You Yeti to Rumble?
Ashes in Your Mouth!
Banzai!
Battle Dome
Be My Shotgun Messiah
Bowling
Brain Surgery
Can you Fly Bobby?
Cat Walk Fever
Circle Of Fiends
Circular Death
Crown of Worms
CruiseMan Arena
Desperate Measures
Do or Die
Faster! Faster! Kill! Kill!
For A Few Shotguns More
Halls of Death
Hop This!
I Could've Had A V8!
Joel, Slayer of Trees!
Kill Fest
King of Hearts
Mara Carte
MaraKart
Moonlight Skirmish
The Once And Pfhuture King
Pfhactory
Pfhor Da' AGP
Pfhor Winds
Phort Boyard
Phenominal Cosmic Power...
Quadropfhenia
QuasiMoFo
Ret Bested
Rising Sun
Scooby Dooby Doo
Simply Elegant
Still Here?
The Ares Project
The Bear Arena
The Chris Arena
The Citadel
The Towers
Thread the Needle
Waldo World
What Goes Up Must Come Down
World Wide Web
Yossarian