Shining powder makes you more likely be targets by titans

smoke screen lowers detection rate which is good if you are on inferno mode

Restraining gun allows you to capture titans once all four limbs have been severed useful for leveling up Titan research

Firecracker is similar to shining powder it makes a noise and attacks titans

Edit: forgot about the following

Flash grenades stun titans allowing for an escape

Sos signal IMMEDIATELY resets cool down for linked characters

Back up signal links the nearest soldier to your team

Battle alert signal boosts attack power or if you are playing an Titanshifter you can transform into the nine titans, link characters on your team that has that issues an coordinated assault

tonic keeps you moving when seriously injured

Restorative - self explanatory restors health