Since this gets asked a lot I thought I'd try and create a master list of links for beginners. If anyone wants to add links to the list please feel free to since I'm making this wiki format.
Start here for newcomers
ChoiceScript Basic Tutorial on wiki
RETowers' Tutorial by @RETowers
Lglasser's Tutorial by @Lglasser
Dedicated ChoiceScript Development Tools
You do not need to download or update ChoiceScript when using either of these tools.
Chronicler Visual Code Editor by @BenSeawalker - aims to reduce the amount of actual coding you need to do
CSIDE by @CJW - aims to help you learn coding with its own step-by-step Interactive Tutorial
You will need to obtain the latest version of ChoiceScript if using a text editor.
Notepad++ - Text Editor for Windows
CScript plugin for Notepad++
Atom - Text Editor for Windows, iOS, Linux
CScript plugin for Atom
Chat Mapper - a tool for writing and testing nonlinear dialogue and events
Fairmath Calculator by @Twiger_Fluff, Google Spreadsheet version by @Eleckar
Official CoG guidelines
Choice of Games Guidelines
Choice of Games Blog Game Design
Choice of Games Style Guide
Dashingdon CScript hosting site by @dashingdon
Neocities Free Hosting
Viewing Game Code
An example of setting up relationship and gender