The Electronic Journal of Differential Equations (EJDE) is a collection of research articles "related to differential equations and their applications." There are over 50 articles for the current volume, possibly with more to come. Assorted conference proceedings and a couple monographs are also provided in addition to the standard publications. For those seeking a challenge, there is a section...

The Electronic Journal of Qualitative Theory of Differential Equations (EJQDTE) publishes peer-reviewed articles related to "the qualitative theory (stability, periodicity, soundness, etc.) of differential equations (ODE's, PDE's, integral equations, functional differential equations, etc.) and their applications." Proceedings of conferences are also available in the journal. Every three to four...