1. The app Hutch
This app is AMAZING! Take a photo of your room and the app will render it in 3D. You can then add furniture and decor or use premade themes!
2. Pinterest
Pinterest is your best friend in finding inspiration for designing your space. You can search for inspiration and be shown hundreds of results, both purchasable and DIY! Creating an account is free!
This tool allows you to put in your own room dimensions and build your room from the bottom up! I used this app to recreate my room exactly, including my floor and ceiling colors, to help me choose a color scheme
4. Floorplanner
You have to sign up to use the tool, but it's still free! View in 3D or 2D and see other people's designs as well!