RCTgo

For a cool one, you could use the way I build coasters:

1.Build Track/Kill Supports
2.Brakes/Catwalks
3.Station/Lift Hill
4.Supports/Footers
5.Trees/Terraforming

Some recommended CS Sets:
Station Jim's Fencing, Station Jim's Gardening (1&2), and the B&M support connectors!

Some CS Sets I use (download links included)

Gadget Coaster Goodies-
http://rctgo.com/downloads/view/4614

ATH Catwalk Set-
http://www.rct-net.de/page.php?id=342...

Turnstyles- http://rctgo.com/downloads/view/5978

NF Particle Effects-
http://www.rct-net.de/page.php?id=342...

Lights (10) JDrowlands-
http://www.rct-net.de/page.php?id=342...

Shadow's Coaster Nets-
http://www.mediafire.com/?hoho46khdau...

Dasmatze Instant Jungle- http://www.megaupload.com/?d=FXRXLB15

Ynor9s Control Room-
http://www.rct-net.de/page.php?id=342...

SK-Canopy101- http://www.customscenerydepot.com/ind...

DasMatze Utilities-
http://www.megaupload.com/?d=UDCLH9IW

Jcat Steelworks-
http://www.rct-net.de/page.php?id=342...

Spice's Pine Trees- http://www.putmeonthenet.net/content/...

Spice's Large Trees- http://www.putmeonthenet.net/content/...

NeonLightingSet-
http://www.rct-net.de/page.php?id=342...

Hotrodudes Park Extraz- http://rctgrotto.coastergrotto.com/fi...

Moby's Steel Jungle V1&V2- http://www.box.net/shared/sxgisxe9gr

MegaCoasterCTR-
http://rctdb.com/custom-tracked-rides...
http://rctgo.com/downloads/view/5709

Spice's Palms V2- http://www.putmeonthenet.net/content/...

Old-Spice's Tropical Trees- http://www.putmeonthenet.net/content/...

M-31-
http://www.rct-net.de/page.php?id=342...

DOWNLOAD AT YOUR OWN RISK
(These were actually all the CS sets I used to make my coaster "Superman Ride of Steel"! Check it out.)