- rb-async-queue-watch — GSource for watching a GAsyncQueue in the main loop
- rb-debug — debugging support functions
- rb-file-helpers — An assortment of file and URI helper functions
- rb-builder-helpers — helper functions for dealing with GtkBuilder files
- RBStringValueMap — specialized hash table for storing string to GValue mappings
- rb-tree-dnd — multi-row drag and drop support for GtkTreeViews
- rb-util — assorted utility functions
- rb-text-helpers — text direction (LTR/RTL) functions
- rb-gst-media-types