Available only for backends
EFileCache
— Simple file-based hash table for strings
Berkeley DB utilities
— Utilities for Berkeley DB databases
ESoupAuthBearer
— OAuth 2.0 support for libsoup
SQLite vfs
EUserPrompter
— Manages user prompts over DBus
EUserPrompterServer
— Server-side user prompter
EUserPrompterServerExtension
— Extension for a server-side user prompter