Age of Strategy Forums

Sturm Guns 4 turns= Unlock Stug III
Pak 38 3 turns=Unlock Pak 38 (Pak 36 is no longer useful)
MP40 3 turns=Unlock SMG squad
Panzerjager I 3 turns=Unlock Panzerjager I
Panther Tank 3 turns=Unlock Panther Req: Heavy tanks construction
Mid war tank destroyer 2 turns=Unlock Pak 40 Req:Pak 38
Marder II 3 turns= Unlock Marder II Req:Mid war tank destroyer
Sturmtiger 4 turns=Unlock sturmtiger Req:Heavy tanks construction and portable anti tank
Portable anti tank 3 turns= Unlock Panzerfaust ability for rifleman and panzergrenadier
Panzergrenadiers 3 turns=Unlock panzergrenadiers.
Panzerschreck 3 turns=Unlock panzerschreck Req: Portable anti tank.
Hafthohlladung 3 turns=Unlock Panzerjager infantries
Semi automatic rifle 3 turns=Unlock Semi automatic rifle squad
Assault Rifle 3 turns=Unlock advanced assault infantry squad
Guided Missile 4 turns=Unlock V1 rocket Req:Rocketry
Rocketry 3 turns
Focke-Wulf Fw 190 Würger 3 turns=Unlock Focke-Wulf Fw 190 Würger
Jet engines 5 turns=Unlock Me262

A lot of these "techs" are units that can be suggested in the units area. Some are though.