A new thread because it doesn't really fit in the review section of "Accessories". Stuff that works well (regardless of whether it costs £1 or £1,000) and why.
I'll kick off with:
Coleman 550B multi-fuel stove, run on white gas. A revelation after a crappy Campingaz 206S. Powerful, shrugs off cold weather, simmers nicely and is very windproof. The only downside is that it stinks for a minute or so after it's turned off. Army surplus, £35.
Folding 1-slice toaster. Brilliant if your stove has a fairly large diameter burner - I tried it on a small gas stove and it was hopeless, with a little hot spot on the gauze. 99p from Wilko.
Coleman F1 Lite gas lantern (uses standard threaded canisters). About as bright as a 40W bulb and gas consumption is quite reasonable. No glass to get broken and it's so light it might as well not be there.
Lifeventure washing line. No need for pegs and for once I had a dry towel in the tent at night. £2.99 from Halfords.
HiGear folding windscreen for a stove. Can be pinned into the ground and it's very rigid. Saves fuel as the kettle boils a lot quicker. About £4 from Go Outdoors.
Chef Aid mini gas lighter. Better than faffing with matches and keeps your hands away from a petrol stove (which will tend to light with a "woof"). 99p from Wilko.
Small plastic bottles for shower gel and washing-up liquid. Saves bushels of space. About a quid each from Superdrug.
Halfords 3-piece aluminium cooking set for one person. Hard to see how the pans could be improved upon, really, although the eating bowl is too small and I don't bother with it. £5.99.
Tiny folding camp stool. Hasn't broken yet under my 12st, and makes all the difference when cooking outside the tent. £1 from Poundland, if you can bear to go in there.
