So, addon development has been pretty active since early on in the beta, and there are some great ones out there.
The ones I recommend as a base must-have are these:
- Hey!Listen! allows you to get audio-visual cues when your HKM (or other charge-ups) are available for use. It's not currently supported, so some of the things might not work. I tested it and the HKM audio cue works just fine.
- Airii gives you overlay information on various flight departures/arrivals for drop ships.
- Personal DPS Meter helps you keep track of how well you are doing.
- Boing! allows you to hop between various shards to maximize dynamic ARES mission rewards (melding tornadoes, incursions, etc.)
To see more tasty addons, check out Curse and the Firefall Forums.