This question already has an answer here:
How much experience with a particular product/technology should you have to be able to list it as a "skill" on your resume?
For example, for my side projects I experiment a lot with various tools and server software. I wouldn't consider myself an expert with those, but if given a task and and adequate time I would most likely be able to make it work.
Is that enough to be able to list those as a "skill"? Is there some standard level of experience at which it is accepted to list a particular technology on your resume?