Damian Conway explains where Perl 5.x is used today and why (hint: the CPAN library repository), and what Perl 6 offers: modern OOP, an optional type system, libraries for parallelism and concurrency, and very powerful built-in tools for parsing including extensible grammars.
Laurent Sansonetti explains using Ruby for iOS development with RubyMotion, how Garbage Collection works in RubyMotion, the library ecosystem, the state of debugging and profiling, and much more.
Peter Bell discusses the state of Java today and whether startups are using it or not, polyglot programming, startups in New York, how to keep up to date with technology, and much more.
Matt Wynne talks about BDD with Cucumber, the value of writing microtests, and the ideas behind hexagonal architecture and how they improve and speed up the development workflow.
Attila Szegedi talks about performance tuning Java and Scala programs at Twitter: how to approach GC problems, the importance of asynchronous I/O, when to use MySQL/Cassandra/Redis, and much more.
Dr Nic Williams talks about the state of the Rails community, the reasons for supporting JRuby and Rubinius implementations and for creating RailsInstaller.
Wayne Seguin explains the ideas behind the Ruby Version Manager (RVM) and the problems it solves, as well as the SM shell scripting framework.
Orion Henry explains what make Heroku's PaaS tick, in particular the new extensible Cedar stack as well as Doozer, the implementation of the Paxos algorithm created at Heroku.
Aaron Patterson talks about performance in Ruby and Rails, some of the challenges Rails and Rack pose for the Ruby GC, and much more.
Justin Sheehy and Damien Katz discuss Riak and CouchDB, the strengths and trade-offs of different approaches to NoSQL, and why both databases are written in Erlang.
Rich Kilmer talks about the benefits of using Ruby and Rails at LivingSocial and the state of the Ruby community and Ruby in the enterprise.
Kostis Sagons talks about how type checking can help with a dynamic language like Erlang and how static analysis tools like Dialyzer or automated refactoring tools like Tidier help keep code clean.