I've been programming for many years and I've always done everything myself: Programming, documentation, support, managing this website, etc.
While sometimes it can be overwhelming and take up a lot of my time, I don't think I'd want it any other way. It's something I enjoy doing (usually).
If you like my apps though, feel free to spread the word! Tell friends & family, post messages in online forums, etc. I don't generally do any advertising myself so word of mouth is my biggest advertisement!