From the github, I've dug up that there a few techs:
Laser Turret Speed
Research Speed
Worker Robots Storage
Character Logistics Slots
Follower Robot Count
Inserter Capacity Bonus
Worker Robots Speed
Flamethrower Damage
Bullet Damage
Grenade Damage
Shotgun Shell Damage
Character Inventory Slots
Crafting Speed Upgrade
Laser Turret Damage
Plasma Turret Damage (don't know what plasma turrets are)
Plasma Turret Speed (again, don't know)
and an "evo-factor" research, which I guess drops the evolution factor?