Ding Ding Ding
In the blue corner, weighing at 400MB ram or less in usage. XFCE with a easy to use UI and light footprint. It has a good file manager and pretty much is the go to standard if you want a cinnamon windows like desktop but less weight for old machines and netbooks.
In the green corner, the ancestor of Gnome 3, born out of hatred for its future counterpart, we have MATE. MATE is also a lean desktop and is easily customizable using different panels if you were a mac, windows or unity desktop user. Without bias I exclusively use this on Ubuntu MATE for a laptop between me and my brother.
Which contender in the desktop ring do you prefer? Why? What’s the positives and negatives for you?
Round 1, GO!
I do the same for my friends and family, installing linux for them while their laptops only have 2 or 4 gb of ram. XFce with debian on slow hardware, mint on 4 gb laptops with medium speed. However, for something really low end, do consider Haiku, as I wrote earlier.