Sendthisfile is a simple web-based service that lets you transfer very large files using a web-browser. You nor your recipient need to worry about file sizes, bounced emails nor FTP. All you do is upload the file using your web-browser and the recipient gets an email notification. Using this email the recipient can download the large file without any hassle. The free service has a 2GB file size limit which can be overcome as a paid service.
TransferApp is a simple file sharing service that lets users share large files through email notification. It provides secure file access with password and auto expiration of files. It can also be branded somewhat with your corporate colors, etc. The basic service is for free, but different packages are included with upgraded features.
YouSendIt is a web-based service to share large files with others. It lets you upload very large files using your web-browser only. It then creates an email notificaiton for your receiver who can download the file using an embedded link. This circumvents the need to attach large files as email attachments. The system is secure and offers various forms of additional features (mobile app, desktop synchronization, etc). The basic service is free and allows file sizes up to 2 GB.
Files2U is a simple web-based service that lets you upload very large files using built-in file acceleration. You no longer have to worry about bounced emails when you send large file attachments. Simply upload the large file on the Files2U secure server and it will automatically send an email notification to your recipient. The very cool thing about Files2U is the builtin file acceleration, this means that very large files can be transferred a lot faster than other alternative solutions. The service is free for use, and can be installed as an in-house solution with your corporate branding for a license fee.