The old style CrushFTP 4 HTML interface is still available in CrushFTP 5. It has the browser uploader, or the java Crush uploader.

The browser uploader lets you choose multiple files, and has the browser to the uploading. It gives real time feedback as the upload progresses, including estimated time remaining and a progress bar. This example screenshot also has a custom form applied to the uploader in order to collect additional information from the user uploading. Forms can be edited in the WebInterface prefs.

The java Crush uploader is similar to the browser uploader with some more advanced options. You can upload whole folders at once, and it can also do compression while its uploading. It too gives you real time feedback as its uploading.