I found a number of new out-of-core graph processing systems

+ 2014 Fast Iterative Graph Computation: A Path Centric Approach
+ 2018 HUS-Graph: I/O-Efficient Out-of-Core Graph Processing with Hybrid Update Strategy
+ 2019 LOSC: Efficient Out-of-Core Graph Processing with Locality-optimized Subgraph Construction
+ 2022 GraphSD: A State and Dependency aware Out-of-Core Graph Processing System