The dependencies listed here are not required for meegpipe to work, but they can enhance meegpipe's functionality.
If you Fieldtrip is installed on your system, meegpipe will be able to import data from any data format that Fieldtrip can read.
If the Neurophysiological Biomarkers Toolbox, has been installed on your system then meegpipe will be able to import and export data from/to NBT data structures.
If Open Grid Engine (OGE) is installed on your system, then meegpipe should be able to use it to push your processing jobs to the grid. A good overview on the administration of OGE can be found on this presentation by Daniel Templeton.
If Condor is installed on your system then meegpipe will use it to process multiple data files in parallel. Condor can be used to submit jobs to specialized clusters, to idle computers, to the grid, or even to the cloud.