Crossnum, Lemi Puzzle, and Afterimage are in the DLE Directory now. I opened all three today and left them unfinished. I wanted to know which one I would come back to tomorrow.
Crossnum wants every line to add up

I opened Crossnum, started today’s board, and left the blanks empty. Each row and each column is an equation. Some numbers are already there. The rest are holes you fill so the line is true. I did not write a score down, and I am not repeating today’s givens. What I sat with is the constraint: whole numbers only, one solution, and a new board tomorrow that gets harder toward Sunday.
You can start without an account. What I like, and this is taste, is that it feels like a crossword even though the letters are gone. I would open this when I want to sit with a page of arithmetic and not a word list.
Lemi Puzzle lets you leave the pieces where they are

I opened today’s picture on Lemi Puzzle, picked a piece count, and started. The board went empty and the pieces sat around it. I dragged nothing into place. Sixteen, thirty-six, sixty-four, and one hundred are on the same page, and there is no clock forcing a finish. Progress stays in the browser if you leave.
The rest of the site is extra pictures. That is not the daily. I would come back for the one new image, then stop. If I only had a few minutes I would take sixteen pieces and not pretend I was doing a hundred.
Afterimage is a colour you have to keep after it is gone

I left Afterimage on round one and did not press the button that shows the colour. You get five rounds. The first study window is five seconds, then the colour goes away, and you rebuild it from red, green, and blue. Later rounds get shorter. I was not going to spend today’s first look on a screenshot.
There is no shared word to guess. The work is whether the colour you remember is close to the one that vanished. I would take this when I want five short checks and nothing to solve with language. Colour Match, on the same site, keeps the target in view. That is a different game.
Which of these should you try first?
If I only had time for one game tonight, I would take Crossnum, because filling one line makes the rest of the board talk back. I would take Lemi Puzzle when I want to stop mid-picture, and Afterimage when I want something over in a few minutes that still feels like I used the day. All three play in a browser without an account.
FAQ
Are all three games updated daily?
Yes. Crossnum labels today’s issue. Lemi Puzzle features one new picture a day. Afterimage is five rounds for that day.
Do I need an account?
No. I started all three while signed out. Accounts are optional if a site offers them.
Does Crossnum have one shared answer?
Yes. Today’s board is the same puzzle, and the page says it has one solution.
Is Lemi Puzzle only the daily jigsaw?
The daily is the featured picture. The site also has a catalog of other images if you want more than one board.
Conclusion
I left Crossnum unfilled, Lemi Puzzle in pieces, and Afterimage unshown. Tomorrow I will pick one and actually finish it. If you want a daily that is numbers, a picture, or a colour you have to keep, these three cover that ground without asking you to guess a word.