Mac OS Resource files
File Juicer extracts 'PICT' and 'snd ' (System 7 Sounds) from the resource fork.
Text is extracted raw and unformatted from all kinds of resources.
Resource EditorsThe original resource handling tool is ResEdit. It requires Classic. Download from Apple
Resfool is a simple resource editor for macOS.
The other (commercial) resource editor Resorcerer survived the transition from Mac OS 9 to X.