__spaMM__ is a standard R package available on CRAN (latest version: 3.7.2, 2021/02/26). It was originally designed for fitting __spa__tial generalized linear __M__ixed __M__odels, particularly the so-called geostatistical model allowing prediction in continuous space. But it is now a more general-purpose package for fitting mixed models, spatial or not, and with efficient methods for both geostatistical and autoregressive models. Its latest major addition is the ability to fit multivariate-response models. You can download here a [gentle introduction](http://kimura.univ-montp2.fr/%7Erousset/spaMM/spaMMintro.pdf)(latest version: 2021/02/26) to the package. Use a CRAN repository to install the package in an R architecture, unless you are looking for something more specific here.