Emacs mode to display the time clocked today in the modeline.
See org-clock-agenda-daytime-mode.el for usage instructions (as is common for emacs packages).
If you clocked 32 minutes in total for today in the LOGBOOK drawer:
You see that time shown in the modeline:
When you reached org-clock-agenda-daytime-target-work-time-minutes
the entry changes the color to the org-done
face (customizable):
When you reach org-clock-agenda-daytime-maximum-work-time-minutes
the entry display changes to the org-mode-line-clock-overrun
face (customizable):