CoHRadar still works...
https://sourceforge.net/projects/cohradar/files/cohradar/0.3.1/CoHRadar%200.3.1.zip/download?use_mirror=master&=&r=&use_mirror=iweb
Extract (preserving the filestructure) and double click the "CoHRadar.jar" file.
In-Game setup:
CoHRadar uses demo files from City of Heroes. The smaller these files are, the less time and memory the program will take.
Creating the Demofile:
Type "/demorecord demo" to start recording and "/demostop" to end. You only need to record for a second or so. I bind these to ctrl+z and ctrl+x for rapid firing.
Open CoHRader. The first time you open the program, you will need to point it to the demo file you created. Do this by clicking the "Load" button. After selecting the file, its name will be saved as a preference for the program. Click the "Parse" button to display the map on in the right panel. To reload the file, click "Parse" again. This is handy for rapid-fire scans.
Select an entry from the table to have it pointed out on the map
Color Key
GREEN - Current Player
CYAN - Teammates / other player characters
DARK BLUE - Doors/Elevators
YELLOW - Glowies / Translucent or Invisi-Glowie
RED - Hostages / Sacrifices
MAGENTA - Nictus-type Models (Voids, Cysts, etc)
GREY - Anything not listed above
It seems to be updated here, but, can't get the updated version to work, but the one above does.
https://bitbucket.org/saintnicster/radar/src/master/