Traders
Sokomine

Configurable mobs/NPC which can trade for you.

Locks
Sokomine

Shared chests, doors, furnaces and signs - with keys

Locked Travelnet
Sokomine

Protect travelnet stations with locks and/or passwords

Apartment
Sokomine

Rent an apartment with your own chests and furnaces close to spawn

Markers
Sokomine

Easy interface (GUI) for the areas/advanced_areas protection mod

Chest Tools
Sokomine

Shared locked chests with bag support and quick inventory access