Not saying it's cheap but https://lightform.com/. - Source: Reddit / 2 months ago
Apple ARKit - A framework to create Augmented Reality experiences for iOS
8th Wall - Cross-Platform Mobile AR
Made With ARKit - Hand-picked curation of the coolest stuff made with ARKit
Metaverse - Democratized augmented reality platform: AR for everyone!
SketchAR - Start drawing easily using augmented reality
Google ARCore - Google Augmented Reality SDK