You know the problem. You have lots of largish files that don’t fit in an email. You need to do this a few times a day and it gets tedious.
I spend each day sending a lot of files (mostly audio tracks and stems) and find myself repeating the process of
1. copying files
2. zipping files
3. putting file somewhere
4. sending a link to that somewhere to someone
Yes sendspace, dropbox, gobbler and other such services are very nice, but cost money.
I ended up creating “Senderella” – a PHP script that takes care of the whole mess in one fell-swoop of a page.
And the beauty of it, that it is free for non-commercial use under the MIT license. (There is an error in the image).
Here is a screenshot:
This script has considerably reduced my workload and dread of releasing tracks 
You can check it out here