Over the years I have accumulated a good number of weeding tools, and while most of my tools work great, I have a few favorites. Most of them are "hands and knees" type tools, but my favorite tool for weeding while standing is the swan neck hoe. I have this exact one:
http://www.gardeners.com/Garde...
It's expensive ($80) but very high quality. It comes nice and sharp and it slices through the weed roots with ease, unless the weeds have gotten really big and tough. For weeding small weeds that have recently germinated, it is practically effortless.
Earlier this spring I bought one of these:
https://www.amazon.com/dp/B002CSZ3NM/ and it has become my favorite tool of them all, but it's a hands and knees tool.