"The GC tuning guide includes details about ergonomics, the various collectors (note it places G1 together with CMS as 'mostly' concurrent GCs); generations, sizing, GC phases, and much more"
"Apart from the core collections that come with the JDK, there are now many alternative collection frameworks. The following provide high performance options: Higher Frequency Trading's OpenHFT Collections; Carrotsearch's High Performance Primitive Collections (HPPC); The fastutil collections; Goldman Sachs GS-Collections; The Trove collections; Apache's Mahout Collections."
