The best way to securely share files, using only your web browser:

Real-time progress bar and time elapsed/remaining during uploads
Create, move, rename, and delete files/folders on your server through the browser, functioning as a web-based FTP system or FTP replacement
Share files that are too large for e-mail by simply uploading them and then sending the link to your associates
Built-in password protection: Create as many accounts as you want.
automatically create a private directory for each upload, perfect for single-use uploads; the private directory is optionally re-usable for new uploads by the user who created it
E-mail notification of new uploads; can be sent to the webmaster and/or to the person performing the upload
Multiple folders/subfolders for uploads, optionally user-creatable
Can function as a photo gallery script, with automatic image thumbnailing, image rotation, and a grid-layout display of your photo albums and thumbnails
Supports custom folder permissions so you can specify read-only or read-write access for users/groups on a per-folder basis
Can automatically rename all uploaded files to remove any "unfriendly" characters, append a time/datestamp, or rename to a completely custom format that you specify
Logs information about each upload, like uploader's IP address, hostname, browser & operating system