| SL Catalog | SL Search Engine | Other | |
| Collections/ Reference Notecards : SL libraries on InfoIsland | ? | ||
| Collections/ Reference Notecards: SL libraries not on InfoIsland | ? | ||
| Collections: out of world libraries | |||
| Collections/ Reference Notecards: SL museums | ? | WorldCat, etc. | |
| Classifieds | x | ||
| Events: SL | ? | x | |
| Places: SL | SL libraries | x | |
| People: SL | x | ||
| Classifieds: SL | x | ||
| Groups: SL | x | ||
| URL linker collections | x | Web Pages |