An absolute must-have for anyone who wants to make maps for TF2. Save yourself the hassle of creating the same game logic every map needs, and use the prefabs to speed along placement of gameplay-oriented objects and systems. Free yourself up to design the map itself!
I find this very useful when I started mapping and I still occasionally use it if I need too.
ALL MUST FOR ALL MAPPERS!
"Oh! It's my tail! It's my tail! It's a-twitch a-twitchin'!
And you know what that means!
The twitchin' means my Pinkie Sense is telling me that the control point gonna being captured by Red!" -
Pinkie Pie (quote modified for tf2maps.net)