Space Systems medium-lift launch vehicle, It can carry up to 25 tons to low Kerbin orbit reusable and up to 35 tons expendable. It can get 12 tons to GEO fully reusable and 14 tons in an expendable configuration. it is partially reusable 

Image Poseidon 9 SLC40

Space Systems heavy-lift launch vehicle, It, can get up to 50 tons to a low Kerbin orbit partially reusable Poseidon Heavy can also get 85 tons to Low Kerbin Orbit fully expended and up to 35 tons of payload to GEO fully reusable and about 60 tons with the side cores expendable. it has 27 Kerlin engines

Image: Poseidon Heavy waiting for Flight 6

Space Systems are designing a two-stage fully reusable SHLV that will be  able to take very heavy missions to LKO and eventually take humans to Duna and Beyond, We are aiming for about 250 tons reusable and 400 tons expendable 

Image: Render of what the  Spaceship will look like

Leviathan was Space Systems cargo resupply vessel for the KSS

Leviathan 2 is Space Systems Crew vehicle for Missions to the KSS or private space stations

Image: Leviathan 2 on the launch pad at LC39B ahead of crew demo 1