| Name | Description | Domain | Sample Image |
| amateur robotics/ | |||
| army/ | U.S. that is | ||
| art/ | fine art | ||
| ephemera/ | of passing interest | ||
| music/ | all kinds | ||
| pedagogical resources/ | resources for teaching | ||
| people/ | famous and otherwise | ||
| social science/ | mostly history | ||
| sources/ | language references | ||
| web design/ | HTML, CSS, etc. |