- GtkSourceMap — Widget that displays a map for a specific GtkSourceView
- GtkSourceRegion — Region utility
- GtkSourceSpaceDrawer — Represent white space characters with symbols
- GtkSourceTag — A tag that can be applied to text in a GtkSourceBuffer
- GtkSourceUndoManager — Undo manager interface for GtkSourceView
- GtkSourceUtils — Utility functions
- Version Information — Macros and functions to check the GtkSourceView version