I have the 4 sided version mentioned by Cherryville Chuck and am very happy with it. I've only used it to sharpen a couple of knives mind you, so can't say about the chisels or plane irons but I would think it should be adequate for those as well.
I can also recommend the Worksharp mentioned by coxhaus. You might find it a bit pricey initially, but it's worth it. I bought some chisels at a yard sale, a couple looked like they have been used on nails they were so gouged. A few minutes using different grits, rough to fine, and I think I could have shaved with them.
Sometimes I wonder whether the world is being run by smart people who are putting us on
or by imbeciles who really mean it.