What is the one best tool you used recently and liked very much?

This may sound like an advertisement, but I want to share it anyway. I had to hastily make documents for my company because these documents were eaten by a dog (funny story, I can tell you if you want). So I urgently began to ask friends and acquaintances and colleagues where I could do it! And I found, this is a great tool. (If you are interested write, I will not post here or I will take for a spammer) (here best service I've used. I was asked to tell you and here you go.)