Since I am working as a freelance software developer, often need to comment on the screen. I keep looking for the application that can

• Draw straight line
• Basic geometries: ellipse or rectangle
• Draw arrow
• Writing text

GIMP, Krita, Pinta etc can draw these. But they are too advance, or too low-level as a raw image editor, which hinders me to work productively.

At the end, I found Shutter from Stack Overflow. I never thought about it, because the main purpose of Shutter is taking screenshot. But it has an image editing feature. And this image editing can do all the things I mentioned above.