More than 1,300 charity technology officials, consultants, and company representatives are gathering here in San Francisco this week for the Nonprofit Technology Conference.

Sessions at the conference — which is organized by the Nonprofit Technology Network — will focus on topics like fund raising on mobile phones, nonprofit technology careers, ways to attract new online donors, measuring the effectiveness of social-media efforts, and creating podcasts.

Among the speakers will be Eben Moglen, founder of the Software Freedom Law Center, and Clay Shirky, author of Here Comes Everybody: The Power of Organizing Without Organizations, a book that looks at how people are using new technologies to organize in nontraditional ways.