FreeMyCloud cydia tweak allows you to upload any file using Cloudie app.
Cloudie is the mobile Application for Cloudapp, a cloud/uploading service.
It allows you to upload Videos, Pictures as well as Texts.
But this is pretty weak compared to what CloudUp can do for you.
It allows you to upload any file from the file system easily. All you need to do is click one button and then select the file from your filesystem.