For websites, we mainly develop in PHP, Python (Django and Warp), and Ruby on Rails. We use WordPress for simple sites and the blog component of custom sites. We use Java and .NET for enterprise systems.
We have particular expertise using Erlang and Twisted Python to build real-time web and reliable/scalable network services.
We have decades of experience working with and optimizing relational databases, and lately have been using more and more NoSQL and NewSQL databases.
For embedded systems, we use high level tools for better productivity and reliablilty, moving from C/C++ as a base to tools like Lua and Erlang.
We have particular experience with middleware technologies, from messaging systems like ZeroMQ to Tuxedo to workflow engines to EAI and business-to-business document exchange platforms.
We manage dozens of virtual and physical machines for customers. We are experts at server operations and administration, including clustering and high availability configurations. We deploy multi-server applications to Amazon EC2, and run our own public VPS hosting service. We use DevOps tools like Chef to automate configuraton management and deployment.
We are always happy to learn something new to help a customer, just let us know what you need. Our "gray beards" have decades of experience in IT, so legacy systems are fine with us, too.