The TreeAndLeaf package combines tree and force-directed layout algorithms for drawing binary trees, aiming to represent multiple layers of information onto the leaves.
TreeAndLeaf is availble from the Bioconductor repository:
if (!require("BiocManager", quietly = TRUE))
install.packages("BiocManager")
BiocManager::install("TreeAndLeaf")
For more information, visit the TreeAndLeaf landing page on Bioconductor.