Tiled Building Blocks: Various useful building blocks
Angry Chicken: The ‘Angry Chicken’ is a crossbreed of a snark, a flood spore, and everybody’s favorite fowl. It’s basically a chicken that jumps and attacks you and is very pissed off. It can also explode.
Its here! You’ll need Episode 2 for this map.
TNT and the DUPLICATOR
This time Tokyo WILL be destroyed. Get Advanced Duplicator too.
Stargates: Yup, working Stargates in Garry’s Mod! Truly a must for any Stargate fan, or for anyone that wants a stylish way to transport objects from point A to point B. Also, don’t forget to install the sounds listed there, too!
OLStacker 2.3: A stacker tool is a must if you’re making large objects. Stack away!
PhoeniX-Storms 2: The huge update to one of our favorite addon packs. This is crammed full of loads of useful construction props for making awesome contraptions. There’s even a train vehicle and a train map (which we’ve yet to figure out how to use, but I suppose I could dig up some documentation 
). Also included is a humongous construct map, which I think may become our chosen map over the usual gm_flatgrass. This should definitely be in your Garry arsenal, its just inhuman for it not to be.
Hoverboard: This thing is pretty wicked. Its a totally working hoverboard, and the physics are done very well. One thing is for sure, though. They’ve done some upgrades to hoverboards since Back to the Future…. they work on water here!
mountain_b6: http://www.garrysmod.org/downloads/?a=view&id=990
gm_adventure_island: http://www.garrysmod.org/downloads/?a=view&id=5652
gm_construct_2008: http://www.garrysmod.org/downloads/?a=view&id=29282
rp_town: http://www.garrysmod.org/downloads/?a=view&id=30340
gm_megastruct: http://www.garrysmod.org/downloads/?a=view&id=30395
WeightStool: “New and improved version of the weightstool, now works at “0″ weight with no spazzing out and supports weight editions to all props at “0″ please enjoy!!”