Old One said:
I have been using a "Hero Point" system IMC for sometime...but am not real happy with it, so I am shopping for a new one. If you have one that you use, please post the details!
In our modern game, we use a mix of the d20 modern and the Mutants and Masterminds system. You get a number of points every session, they're based on your class and level (5+ 1/2 level for most people, something like that).
You can use them for a ton of things. The d20 modern rules allow you to spend one to add a d6 to whatever you just rolled. That's good if you roll high, but not quite high enough.
The MnM usages are much more versatile. For instance, you can spend one to re-roll the d20 roll you just made, and no matter what you roll, you get at least a 10.
You can spend one to raise your AC by 5 for a round.
One will give you back 3xcharacter level hps.
One will confirm a critical, or prevent a critical from confirming against you (has to be spent before the confirm roll is made).
The DM has a bunch of little tokens that he gives out to show how many you have, which is great, because now we have a physical thing that can be spent, so we tend to use them more. Before we would kinda forget about them.
These work great in a modern game, particularly because we have no magic and obviously, no cleric. They keep the game rolling, give us an action-hero kinda feel, and save our butts.
Unfortunately, the NPCs can use them too

We use the MnM formula for that, and I forget what it is exactly, but the DM ends up with about as many points for his session as each of us does for ours, to spread over all his NPCs. They tend to get saved for the climactic encounters.