Software that can save different images format

Hello I am a regular computer user. I need drawing software. The software should able to save drawings in various formats. I need the drawings to be saved as .jpg, .png, .gif formats. I want such software due to need of some professional works. I have digitalworkshop software but this is not able to save file as jpg format. Can anyone provide me some links to get good drawing software? Please help me by providing your value able suggestions.
