Ask HN: Where can I find a list of technologies and what they're really good at?

I want to find a list of technologies (i.e. programming languages), and what they're really good at. This would be really useful when I start a new project and need to figure out precisely what technologies I should be using. For example, I read that C is good with performance, and Ruby is good for web development, so maybe the list would start off like so: Technology - What it's good at C - Performance Ruby - Web development Every technology should do one thing and do it well, so I want to know what that one thing is, aggregated into a list somehow.