BeeRef

Works pretty much exactly like PureRef. Glad I decided to see if there are alternatives. This is the only one I found that is comparable while also being open-source.

great and they got a new update

I hope to bump my review up to 5 stars once a few things have been ironed out:

• Can't drag and drop images from web browser (but copy/pasting works).
• No questions asked when hitting CTR-N for New Scene (What even is a Scene? And how do you switch between them?). If you haven't saved the scene prior to this shortcut/command, it's gone without confirmation.
• No questions asked when closing! Same thing: hit the X and your collection is gone without confirmation.
• Versioned executable, which is not ideal: Makes linking in the filesystem problematic.
• No Custom Shortcuts. Personally I'd like to remap Shift-commands to same but without Shift, e.g. A for Select All, O for Optimize, etc. (Akin to Blender's keymaps.) Now I'd have to use something like AutoHotkey (Windows) for that, which is not ideal.

Some of the pluses are:

• Free/opensource
• Lightweight
• Stable
• Easy to use
• Quick startup tim
• Native UI! You can choose to show elements like title bar, window frame or not, etc. which is great.

Will update my review if things improve. For now, I'm staying with PureRef. (Jan 2023.)