SELECT	categories.title, categories.id,
		(
			SELECT	count(*)
			FROM	products
			WHERE	products.categoryid = categories.id
		) AS productCount,
		(
			SELECT	count(*)
			FROM	images
			WHERE	images.categoryid = categories.id
		) AS imagesCount
FROM	categories

These are correlated subqueries, so if the number of categories is very large then there could be some performance implications, but I have found them to perform well generally.

I find this clearer and easier to read. The code is half is long and I think the intent is a bit more obvious (though I could be biased). It also works the same on every database I have used.