There are quite a few other minify plugins out there, such as WP Minify. However, keep in mind that combining and minifying scripts and CSS files is an inherently risky business. It takes only one misbehaving script to bring it all down, and with the number of scripts and CSS files in a typical WordPress install, this is really not that rare.
In fact, whenever I implement minification on any site, it will almost always fail. Then you'll need to trace which is the misbehaving file and exclude it from the list of files to be minified and combined.