I don't know about other Outcast players but a certainly had a hard time trying to find out what all the items do!
Here's the ones I've worked out, if anyone could explain the HUD on the EVD (The Binoculars You Get At The Start) please tell me!
Here's the ones I know:
UBIK-OA- Creates a fake person, the enemies begin to shoot at it, and take it for you, handy if used with the PPS
PPS- Makes you invisible to everyone, but BE WARNED, you can't shoot while using the PPS
Proxi-130- From what I can tell this points to people(mainly enemies?)
Thndr-stp33- This looks like a rather nasty mine
Flink- The most handy thing in the ENTIRE GAME, it's a teleporting device, use it the first time and it drops a small beacon, use it a second time(once you've dropped the beacon) and it teleports you to where you dropped the beacon.
NOTE=You can drop this at one place and then go to another then come back and it'll still be there, but you can't teleport across maps
Clprt- The Detonator for TNT(GOOD FUN) Use with caution, it sets of ANY tnt in it's range, if you see an outpost with TNT that's to heavily gaurded for you, use the Clprt, it's a god send!