What image editing programs are there for a laptop that has little memory and is already older?
Pinta
https://pinta-project.com/pintaproject/pinta/
or a web version
https://www.fotobearbeitung-online.de
Photoshop (older version, eg CS 3).
On old T60 under XP I use "GIMP 2.8.10" and it is totally OK
Small corrections with IrfanView with all plugins.