Simply Attached gives the ability to append any number of files to your pages and posts. It creates a nice looking table of download links.
There are five attachment list styles that should work in most cases. Additionally, you have the ability to change the colors and some font styling. Also, more styles are coming.
In the future I will be adding more list styles and more theme support, the ability for custom CSS in lists, MORE cloud file storage (Amazon S3 for example), PayPal support for paid digital downloads.
The Dropbox Chooser app needs to be registered to a web domain and it cannot be generic. Sadly, that means I could not create a generic integration for everybody and you will have to register to get an app key. But, the app key is free and you can get it instantly.
I really tried to fix this but it seems that there is a problem on the Dropbox side. I did create a bug ticket and I hope it gets fixed because it annoys me too.
Yes. On the configuration screen uncheck the 'Use Dropbox' option. The normal attachments will continue to work and the Dropbox attachments will not appear in posts. Dropbox attachments WILL ALWAYS appear on the post edit screen until deleted.
Simply Attached is based on the Attachments plugin by Jonathan Christopher and the Easy Attachments plugin by Dan Nagle. It includes bug fixes and improvements.