Kablary

Sequel set to Archbak's Saw set, including a considerable number of new items from traps to fence links to storage containers!
Originally created by Archbak

The set includes:
1st lift (blue w/ green animated power uppers)
2nd lift (stars, ghost lightning animated)
Originally created by KrakatoaCoo

This set has everything you need to make raging rivers, waterfalls or scenic waterways or anything you can imagine. Comes with animated river textures, water pieces, particle effects, waterfalls, and even whirpools! The pieces are designed to fit together to quickly make a long flowing river. Place the textures on the game water, the included water pieces, and the White Water Rapids Ride. 
Updates: Added a half size version of the whole set. Along with a couple improvements/fixes to the original set. Added 1 tile wide pieces that match the curves of the RR track, more waterfall options, and terrain conforming pieces. Low-res textures for lower-end PCs (see bottom of readme for how to install lower res textures)
Originally created by JimmyG

This sequel to Ruined It! contains many scenery pieces including crates, barrels, fences, rubble, trash, and a nuclear tower.
Originally created by Matt9537

A set used to spruce up your haunted asylum ride or attraction with items from meat lockers to morgue beds!
Originally created by Archbak

An old market set to complement OS' Arabian Market set, containing items from shop structures to versatile item placements to ground extras. 
Originally created by OldSpice

A set created for Team D's 'Lake Town vs Dry Town' from Summer Showdown 2014, with a variety of pieces from paths to tunnels to right signs to more dam walls. 
Originally created by Boston & JRCH

A set created for Team D's 'Lake Town vs Dry Town' from Summer Showdown 2014, with a variety of viking figures, crystal monsters, and hybrids between the two in this set.
Originally created by Boston

A set created for Team D's 'Lake Town vs Dry Town' dark ride 'It Came From Beneath Lake Town' from Summer Showdown 2014, with a variety of pieces for creating a sewer.
Originally created by Boston
See the set in action:
 

A set created for Team D's 'Lake Town vs Dry Town' from Summer Showdown 2014, with an extended amount of dam walls that served as a barrier between the two Towns.
Originally created by Boston

A set created for Team B's 'Whims & Whistles' from Summer Showdown 2014, with a varitey of pieces from barrels to boxes to cliff pieces.
Originally created by CTRSind, PB&J, Weber

Set includes Starbucks stall with lit neon sign, as well as working concrete bench and table with Starbucks umbrella. Starbucks stall is located under 'drink stalls,' bench and table are located under 'benches.'
Originally created by Krankin4 (K4C)

A Set created for Team F's 'District 7' from Summer Showdown 2014, with a variety of pieces from ride targets to neon signs to LEDs to propaganda posters.
Originally created by Dutcher and others

El Dorado Hotel with a 3-vendor option. Comes with countertop hotdog and popcorn machines.
Originally created by Krankin4 (K4C)

Heating Ventilation and Air Conditioning. 
Originally created by LR (Reaver) 

Non-functioning (decorative use only) pieces to create the interior of a lavatory. 
Originally created by LR (Reaver)

The set is located under medium scenery. There are 80 pieces, each pipe has 6 sides. All pieces are recolorable. 1-4 are flat pieces, 5-7 are vertical pieces, and the elbows vary. 
Originally created by LR (Reaver)

This is a .txt document that enables a small collection of pre-named peeps to roam your park files permanently! No more having to track down a peep to rename them every time you need to remove the UI or enable a cheat after every bootup - that peep will be in your park with its name every time you open and close the game.
To install, extract the Cheat Group .txt doc to Documents/RCT3/Peeps and give the game a couple of play cycles for it to work. As long as you have peeps in your park, you're good to go.
EDIT: The peep isn't ALWAYS in your game on bootup. Sometimes they are, sometimes they aren't. The peep will eventually enter your park as long as it's open and has something to attract them in, but the amount of time it takes for this to happen is random. YMMV
The following peep names are included, remove or change if you would like to ignore a cheat:
Originally created by disneyguy100

Recolorable full-tile mortars with inverted and offset variants. Works with fireworks and lasers. Created by StickyGum32.
NOTE: These mortars are found in the Scenery Walls section, under "Misc" item type. 

A collection of single and multi-position mortars. Full-tile placement. Fireworks and lasers can share a single mortar, and base aiming one mortar affects the rest within the object. Created by RCT3maniak.
NOTE: These mortars are found in the Scenery Items section, under the "Generic" theme (item size: small).

A 360 degree circular mortar. Full-tile placement, found in the Mortars section within the MixMaster. Created by Manuel5cc.