Generic curve fitting package with nonlinear mixed effects model

A meta-analysis package for R

A Julia package for fitting (statistical) mixed-effects models

Combining tree-boosting with Gaussian process and mixed effects models

Linear Models With R and Extending the Linear Model with R: Generalized Linear, Mixed Effects and Nonparametric Regression Models - by J Faraway

R package providing utilities for INLA

CRAN Task View: Mixed, Multilevel, and Hierarchical Models in R

Robust linear mixed effects model

Tools for multiple imputation in multilevel modeling

Featured Nonlinear Mixed effects Models

A Nonlinear Modeling Library (ANML)

Curated list of the sources about multilevel models

scikit-learn wrapper for generalized linear mixed model methods in R

RCall support for MixedModels.jl and lme4

R Package for fitting latent multivariate mixed effects location scale models.

Evolution of quantitative EEG over the first few days of life for preterm (<32 weeks GA) infants

Hierarchical modeling in TensorFlow layers

PBO BSM Earthquake database from Barbour and Crowell (2017): "Dynamic Strains for Earthquake Source Characterization"

Multivariate Time series interpolation using hierarchical mixed effects models.