ksnip

Features:

• Supports Linux (X11, Plasma Wayland, GNOME Wayland and xdg-desktop-portal Wayland), Windows and macOS.
• Screenshot of a custom rectangular area that can be drawn with mouse cursor.
• Screenshot of last selected rectangular area without selecting again.
• Screenshot of the screen/monitor where the mouse cursor is currently located.
• Screenshot of full-screen, including all screens/monitors.
• Screenshot of window that currently has focus.
• Screenshot of window under mouse cursor.
• Screenshot with or without mouse cursor.
• Capture mouse cursor as annotation item that can be moved and deleted.
• Customizable capture delay for all capture options.
• Upload screenshots directly to imgur.com in anonymous or user mode.
• Upload screenshots via custom user defined scripts.
• Command-line support, for capturing screenshots and saving to default location, filename and format.
• Filename wildcards for Year ($Y), Month ($M), Day ($D), Time ($T) and Counter (multiple # characters for number with zero-leading padding).
• Print screenshot or save it to PDF/PS.
• Annotate screenshots with pen, marker, rectangles, ellipses, texts and other tools.
• Annotate screenshots with stickers and add custom stickers.
• Obfuscate image regions with blur and pixelate.
• Add effects to image (Drop Shadow, Grayscale, invert color or Border).
• Add watermarks to captured images.
• Global hotkeys for capturing screenshots (currently only for Windows and X11).
• Tabs for screenshots and images.
• Open existing images via dialog, drag-and-drop or paste from clipboard.
• Run as single instance application (secondary instances send cli parameter to primary instance).
• Pin screenshots in frameless windows that stay atop other windows.
• User-defined actions for taking screenshot and post-processing.
• Many configuration options.