If the number of technologies that you are really skilled in is small, then you might want to push the limits a little on what you include. But I'd be cautious to include some qualifying words so if you are quizzed, you can say, Hey, I said I only knew a little about it. For example, on my resume I have on occasion said things like "some PHP", indicating yes, I have written programs in PHP, but I don't claim to be particularly proficient at it. That one word "some" tips off the reader without going into a long discussion. And frankly, I don't want to go into a long discussion about what I DON'T know, I want to fill my resume with what I DO know.
When you say you are "aware of their existence and know what they are for" ... well, there are lots of things that I know exist, but I don't mention them on my resume. Like, I know that nuclear reactors exist and what they are for, but I haven't the vaguest idea how to design or build one. So I don't put nuclear reactors on my resume. That would just set up totally false expectations. And what if an interviewer happens to pick one of these things that you really know nothing about as the thing to quiz you on? If he asks one or two questions and you don't have right answers, he may not give you a chance on other things but just assume that you're trying to bluff your way through the interview and he's caught you.
You list a fair number of things that you claim to know well. That should be plenty to make your resume look credible. If you've written a couple of small programs in some other language and you think it's important, you could put it on a resume with a serious qualifier, like "have played with C++". But if it's just a matter of, you've seen the name "C++" on course listings or in want ads but all you know about it is that it's some sort of programming language or something to do with computers ... I definitely would NOT put it on your resume. You're just setting yourself up to look bad.