My $0 Project Management and Documentation Solution

I'm pretty used to the Atlassian + Gliffy stack for project management, data modeling, and documentation. What about all those projects I work on that have a budget of essentially $0? If you're hemming and hawing about the $6/mo for an AWS EC2 micro instance that will provide you with web, app, db, and doc hosting, you're probably not going to spring for the $10 JIRA + $10 Confluence + $10 Gliffy = $30/mo for developer tooling.

My preferred $0 stack?

• Bitbucket.org
• Repository hosting (Git/Hg)
• Artifact hosting (download releases & such)
• Wiki
• Issue tracking
• Trello.com
• Kanban task/feature/workflow management
• Drive.google.com
• User Guides
• Draw.io diagrams
• Project management spreadsheets
• Draw.io (backed by Google docs)
• UI Mockups
• UML
• ERD & Data Modeling

The draw.io tool is a major win. It provides super-quick data and UI modeling workflows, along with a slew of handy shapes right off the bat. 

Here's a super-quick basic sample that shows an android mockup, site mockup, erd, and basic diagram:

(Full size image: https://drive.google.com/file/d/0B8ABIZTohsh_SElUVGlIS045dFk/edit?usp=sharing)