For spreadsheets there’s also TurboCalc and ProCalc (I think that’s the name; it’s the one from Gold Disk). Older versions of those might work on 1.3. Final Calc might even work under 1.3... not sure.
For word processing under 1.3, Final Copy II is a good bet. You might also look into ProWrite.
EDIT: Amiga Future also maintains a pretty good
software database. <— I’ve pre-linked to the office applications section.