Try

Try is a packages that allow you to try out Emacs packages without installing them. If you pass a URL to a plain-text .el-file it evaluates the content, without storing the file.

Remember to make packages from your package-archives available for download with M-x package-refresh-contents.

Packages from ELPA will temporarily be stored in /tmp/ by default.

Unfortunately, you won't be able to try Try with M-x try RET try.