I think all the programs on Epals website are fairly useful to both students and teachers. As a future teacher I especially prefer Projects, Collaborate, and Teachers.
Projects: Each project is used to classroom's needs and the topics are of global interest. New teachers benefit greatly by various perspectives and topics.
Collaborate: Through Collaborate people can find classrooms simply by searching the country or project. It's a great way to collaborate and connect with classrooms at the other end of the world.
Teachers: In Teachers section, Teacher Forums is my favourite. This a perfect stage provide for teachers from all over the world to share their resources and various perspectives.
As far as my discipline is concerned, I could use all the functions from Epals to better my teaching skills especially from learning at Teachers Forum. For example, I could talk with other experienced TESOL teachers and learn how to engage my students well learning in classrooms. Understanding the importance of manipulating technology in classrooms, I will try to learn as much as possible so I could let my students benefit from my class.