Question on sales enablement tools and marketo

We currently have all of our documents for our website hosted in Marketo. I am vetting different tools like showpad and seismic to help our sales and qualifying team search for and use the right content when reaching out to prospects and customers. We have a very small budget and I'm just looking to get our content taxonomized and easily searchable as well as being able to see the analytics when content is shared/opened/viewed and having that all flow into marketo and salesforce. Seismic and showpad are way too expensive and have way too many extra features for this. Any other recommendations?

TIA!