What does moving system has:
Multiplayer support(as Listen Server)
Stamina usage for running/jumping - you can't perform some actions with low stamina
Jumping and double(triple, etc.) jumping - there's special yellow points that can be placed in world and allow to jump more than once.
Walking/sprinting (with leaning for them while turning)
Crouching/sliding(player will slide if he tries to crouch while sprinting) - also there's ceiling detection: player won't stand up after sliding unless there's some space for it
Small stopping movement after instant stop from running
Wall running with corner system and gravity affection
Hanging/climbing/moving on ledges/jumping from ledge to ledge with corner detection system
Rolling and dashing
Jump Pads
Slippery ground that can be placed in world and where you skid and glide
More than 20 animations
What does inventory system has:
Multiplayer support(as Listen Server)
Slots with drag and drop
World object placement and taking
Equipment slots(to put some staff on the player)
Some items to interact with(+guide how to make your own - can find it in Documentation)
All inputs are added in Engine - Input so it's easy to understand what is what and to reassign keys.
Also death(from a fall from big height) with ragdoll and respawn system included.
Some guidelines how to work with blueprints and objects provided, also there's a lot of comments in the project itself.