Paint.NET
Paint.Net is also a very good free photo editing software and is used by many people.
The Paint.NET user interface has improved a lot over the years, adding many advanced editing tools including layers, undo actions, tons of filters, plugins, and pan/zoom functionality. Useful 3D.
Although not providing full editing features like Photoshop, Paint.NET is definitely the perfect choice for low-end computers and laptops.
Pros:
- 100% free
- The interface is intuitive and very easy to use.
- Support powerful and professional image editing toolset.
- Beautiful and unique effect store
Dowload: https://www.getpaint.net/