Andromeda is part of HADES.
AsynchroNous Disk-based Representation of MassivE DAta (ANDROMEDA): An R package for storing large data objects. Andromeda allow storing data objects on a local drive, while still making it possible to manipulate the data in an efficient manner.
To install the latest development version, install from GitHub:
install.packages("devtools")
devtools::install_github("ohdsi/Andromeda")
Documentation can be found on the package website.
Read here how you can contribute to this package.