When it comes to technologies we use high quality , proven and popular technologies as building blocks. We mostly use opensource technologies in the stack of solutions. When it comes to Operating Systems eg we use LINUX that is rock-solid and immune to malware and virus attacks. When it comes to RDBMS we use PostgreSQL that is the most advanced opensource database solution. Similarlly for almost any need high quality and feature rich opensource solutions are researched and used that keeps the licencing cost of entire system almost zero.
Having said all that we still believe in using the right tool for the right job and are not religiously married to using a particular platform or technology.