| Nboost | |
| Nfilesystem | |
| Ngazebo | Forward declarations for the common classes |
| Nclient | |
| Ncommon | Common namespace |
| Ndetails | |
| Nevent | Event namespace |
| Ngui | Gui namespace |
| Neditor | |
| Nmodel | |
| Nmsgs | Messages namespace |
| Nphysics | Namespace for physics |
| Nrendering | Rendering namespace |
| Nsensors | Sensors namespace |
| Ntransport | |
| Nutil | |
| Ngazebo_shared | |
| Ngoogle | |
| Nprotobuf | |
| Ncompiler | |
| Ncpp | |
| Nignition | |
| Nmsgs | |
| NOgre | |
| NSimTK | |
| NSkyX | |
| Nstd | STL namespace |