Screenshot from OpenArena running AfterShock mod. It demonstrates different colors for the enemy and team grenades (pink and green), see also ForceWeaponColor .
Furthermore it shows a new Custom hud , optimized for clan arena (elimination) game type: The big red and blue numbers in the middle of the screen displays the current team living count (in warmup set to 0), whereas the vertical white bars left to the health and right to the armor count are working as health respectively armor bars: The size and the color of the bars displays your current health status (The length of the bar is a equivalent for the health / armor value).
The big timer displays the current round time, whereas the game time is dislocated in the upper right corner.
OpenArena and Aftershock are both licensed under GPLv2. Screenshot was captured by **HD.