list of my favorite tools includes a fork, a spade and a hoe (Dutch variety), chainsaw, and some maintenance tools too like sharpeners, cleaning oil. and I also read some blogs to keep me updated for tools and I think Hand tools that are useful include a hand fork and trowel and, something a few of us on here have recently invested in, a manual tiller. You can google these to find your best buys as Garden Centres can be a bit expensive. Half moon edgers and edge clippers are also useful as is a hedge cutter. Go for stainless steel tools if you can afford them as they are excellent (but not essential) - easy to clean and non-rusty.
