Respected Harry Singh,
There is a long list of Photo Editing Softwares available :
1. GIMP (This is my first preference becuase this is Open Source/ free , easy to use and light weight (portable version is also available). Majority of the other good software are paid and I will not recommend you the pirated version of those)
2. Microsoft Office Picture Manager (This is useful for very low level editing and easy to use).
3. Photo Plus
6. Corel Photo Paint
7. Some online photo editing websites are also available. You may use google to search for that.