This is a table of default lists returned by list.GetTable in the Sandbox gamemode.
Contents of these lists can be extracted via 
list.Get, using Name as key
 
| Name | 
Description | 
| DesktopWindows | 
Context menu icon buttons on the upper left corner of the screen | 
| PlayerOptionsModel | 
Models able to be used as Playermodels | 
| PlayerOptionsAnimations | 
Animations able to be set for a playermodel's preview | 
| SkeletonConvertor | 
Sensorbone defintions for player models used with the Kinect motion sensor (See motionsensor) | 
Spawnmenu lists
| Name | 
Description | 
| NPC | 
NPCs spawnable from the NPC tab | 
| NPCUsableWeapons | 
Weapons able to be used by NPCs | 
| OverlayMaterials | 
Post process screen overlay textures | 
| PostProcess | 
Post process lua effects | 
| SpawnableEntities | 
SENTs spawnable from the SENT tab. Automatically added with scripted_ents.Register with any meta-created SENT | 
| TexturizeMaterials | 
Materials used for the Post Process Texturizers | 
| Vehicles | 
Vehicles spawnable from the Vehicles tab | 
| Weapon | 
Weapons spawnable from the Weapons tab. Automatically added with weapons.Register with any meta-created SWEP | 
| ContentCategoryIcons | 
Custom icons for categories in Spawnmenu tabs | 
Tool-specific
| Name | 
Description | 
| BalloonModels | 
Models spawnable with the Balloon tool | 
| ButtonModels | 
Models used for the useable Button tool | 
| DynamiteModels | 
Models able to be used as Dynamite | 
| EffectType | 
Effects spawnable with the Emitter tool | 
| HoverballModels | 
Models able to be used as Hoverballs | 
| LampModels | 
Models able to be used as Lamps | 
| LampTextures | 
Materials able to be cast as Lamp textures | 
| OverrideMaterials | 
Materials applied using the Material tool | 
| PaintMaterials | 
Decals paintable with the Paint tool | 
| PhysicsMaterials | 
Physics material properties applied with the Physical Properties tool | 
| RenderFX | 
Render FX available form the Color tool | 
| RenderModes | 
Entity render modes available from the Color tool | 
| RopeMaterials | 
Materials used by the Rope tool | 
| ThrusterEffects | 
Effects able to be used on Thrusters | 
| ThrusterModels | 
Models able to be used as Thrusters | 
| ThrusterSounds | 
Sounds able to be used on Thrusters | 
| trail_materials | 
Materials used for the Trail tool | 
| WheelModels | 
Models able to be used as Wheels |