Hello everybody 
I just released a free parallax scroller, that is aimed to speed up creation of parallax backgrounds and also work well in all aspect ratios, depending on what you need, as well as allow camera zoom and endless behavior up and down.
Asset Store Link: Responsive Parallax Scroller Tool
Video Guide: Video Guide
To keep things easy, I tried to focus on all functions that are required for productions, keep them simple and focus on two inspectors: The overall manager and the individual layers:
Features:
- Open-Source
- Productivity focus
- Parallax-Scrolling
- Auto-Scrolling of layers (like clouds)
- Options for Responsive-Design
- Reacts on apect ratio changes at runtime
- Can scroll down indefinitly up and down with custom behaviour
- Zoom support
- 3D Zoom effect
This scroller is used for my own projects and will get some updates in the future. I intend to keep it small and functional, though. Please feel free to comment on if you found the scroller helpful and what you use it for 