These are some resources about starting and managing open source projects. All of these were produced by Open Tech Strategies, or were written by or with significant involvement from people now at OTS.
Some Common Issues in Open Source Licensing (PDF, ODT)
Whitepaper on common questions about open source licensing.
Originally written for a client, and published (with the client's agreement) because it addresses questions we encounter frequently.
The ROI of Open
What is the return on investment of doing technology projects in an open source manner?
Be Open From Day One, not Day N.
Why open sourcing is easiest when done at the start of development.
Producing Open Source Software: How to Run a Successful Free Software Project
A freely-licensed, widely cited book about how to organize and run open source projects.
Choosing a License
How to choose the right open source license for your project.
Releasing Open Source
A "how to release open source code" checklist.
Open Source Development Guidelines
General guidelines on how to run a project after it's open sourced, tuned especially for government projects.
The IT Dashboard, Six Weeks In
How an open source community looks shortly after code release (in this case, software released by a U.S. Federal agency working with a vendor). This gives a sense of how an early-stage open source community operates on a day-to-day basis.