#try.el

This is a package that allow you to try out other Emacs packages, without installing them. If you install a package (using package-install) you have to remember to delete this, if you realize you don't need that package. A common way around this is to copy the code into the *scratch*-buffer and evaluate the buffer. This extension essentially automates this process, by excepting a URL to a plain-text .el-file, downloading the content and evaluate it.

Too bad you won't be able to try out try.el with try.el.