Object Oriented: C++, Java, Python
Procedural: Fortran, C, Pascal, QBASIC
Web Development: Python (Django), PHP (Yii), JS (JQuery)
Database: Oracle, MySQL
Parallel Computation: PETSc, MPI
Numerical Computing: MATLAB, Mathcad
Server: LAMP, Amazon Cloud Computing (EC2, S3)
Other: Visual Studio, UNIX/Linux, Shell Scripts