I did a public talk on "Apache System Projects in the Real World" at the IESL talk series organized by IT & Communications Sectional Committee, The Institution of Engineers, Sri Lanka (IESL). Following are the slides. This is a updated version of my earlier talk at Apache Con Roadshow 2009. The talk discussed opensource, apache, and LEAD project. LEAD project (http://portal.leadproject.org/) is a heavy user of Apache Projects like Axis2, ODE etc., and it has pushed those to the limit and made contributions back. Also at the end, the LEAD project itself was donated to Apache as "Apache Airvata" (http://incubator.apache.org/airavata/). Therefore, I believe LEAD project is indeed an great example of Apache Web Services in the real world.