The success of the e-learning paradigm observed in recent times has created a growing demand for e-learning systems in universities and other educational institutions, which has led to the development of a number of either commercial or open-source eLearning Management Systems (eLMS). How they work or, what they are doing? These are some new problems arising that demands appropriate solutions. The present discussion initially highlights certain distinctive features of e-learning management systems. Basically the idea of adaptive e-learning is being facilitated through the use, implementation and installation of various open source or commercial software. Such software for their operation requires specific platforms. Because of multiplicity of platforms and approaches for systems implementation, it becomes increasingly difficult to manage or compare them. Each new LMS presents its own learning model. How to compare different e-learning platforms, and on what basis to choose the most adequate one, is a task of ever increasing importance. Thus a comparative study has been used to enumerate the utility and effectiveness of some e-learning software like Moodle, Sakai, Atutor, Caroline and Dokeos. However, with implementation of different eLMS modules certain barriers have evolved. Issues related to these barriers would be addressed in the concluding section of this discussion. Besides this, the conclusion also provides insights in regard of what lies in future for the idea of e-learning management systems, and how can its drawbacks be resolved.