Tools vs. Frameworks

How many times did you wish there was a good tool for some web programming/testing related task and you couldn’t find one? Now how frequently an average JavaScript developer needs a new framework with some features that are not already present anywhere else? And yet, the next OSS project that developer will start is going to be a framework not a tool.

While not necessarily a bad thing, why does it happen? One may say that good tools are hard to create. Well, so as good frameworks. Your thoughts?