Ever since working on a large market garden, I have been a staunch fan of the swoe, that golf club of precision and surgical application. I used to do all my veg with it, leaving it standing up and proud at the end of the row, marking where you had got to. The stainless steel and the shape of the blade (thanks to Wilkinson Sword) means that you can use it in wet conditions, when you have no other choice but to tackle those pesky weeds.
But a few years ago, neighbours were moving and were dumping a skip full of useful stuff, including a Cultiweeder made by Wolf tools. This has a 3-pronged cultivator part and a small sharp hoe combined into one tool, depending on which end is up. I thought it would be more of a hobbyist tool, but it has survived true field punishment and has proved to be really useful and was a constant companion last summer. You can cut off topgrowth with the hoe and then swivel round and have a go at the roots with the blade. The cultiweeder is useful for ground preparation too and the hoe is good for compacted paths baked hard in the summer.
Of course, if you really want to motor then a wheel hoe can work wonders, as long as the soil is not too compacted, with the added benefit of an amazing workout for your pecs. Great for taking out those flushes of annuals that we'll be getting right now....