Two Web Based Systems -- Any Suggestions

I am possibly going to write two web based applications. I am wondering if anyone knows of similar, high quality, possibly free software that does the same thing:

1 - Affiliate / Click Tracking, etc Software.
Ultimately, this would be a web based system by which one would submit a creative, load in tracking urls, then once the campaign is launched, the system tracks the clicks, opens, impressions, etc.

Very simply software, but if there is a commercial, free, or private label setup I can take advantage of, that would save me a ton of development time.

2 - Document Management / Approval
This is more simple than it sounds. It just needs to allow one to upload documents... doesn't matter what type of document. A client or other stakeholder would login and if they had access to the particular document, they could review it, post comments on it, then submit a change request.
This process would continue until the document is approved and the project is closed out.

The project would be available for viewing history, but no new changes could be submitted at that point.

Same as above... I don't mind writing this but if there is a commerical app (hopefully private label software), or even free software that I can modify, that would be lovely.