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...

This is the homepage of an online journal that disseminates "articles that significantly advance the study of categorical algebra or methods, or that make significant new contributions to mathematical science using categorical methods." A new volume is published each year, consisting of between ten and twenty research papers. The journal commonly focuses on the applications of category theory to...