Build donut/pie charts with 'ggplot2' layer by layer, exploiting the advantages of polar symmetry. Leverage layouts to distribute labels effectively. Connect labels to donut segments using pins. Streamline annotation and highlighting.

Tools for exploring the topography of 3d triangle meshes.
    The functions were developed with dental surfaces in mind, but could be 
    applied to any triangle mesh of class 'mesh3d'. More specifically, 'doolkit'
    allows to isolate the border of a mesh, or a subpart of the mesh using the 
    polygon networks method; crop a mesh; compute basic descriptors (elevation, 
    orientation, footprint area); compute slope, angularity and relief index
    (Ungar and Williamson (2000) <https://palaeo-electronica.org/2000_1/gorilla/issue1_00.htm>;
    Boyer (2008) <doi:10.1016/j.jhevol.2008.08.002>), inclination and occlusal
    relief index or gamma (Guy et al. (2013) <doi:10.1371/journal.pone.0066142>),
    OPC (Evans et al. (2007) <doi:10.1038/nature05433>), OPCR (Wilson et al. 
    (2012) <doi:10.1038/nature10880>), DNE (Bunn et al. (2011) <doi:10.1002/ajpa.21489>;
    Pampush et al. (2016) <doi:10.1007/s10914-016-9326-0>), form factor (Horton 
    (1932) <doi:10.1029/TR013i001p00350>), basin elongation (Schum (1956) 
    <doi:10.1130/0016-7606(1956)67[597:EODSAS]2.0.CO;2>), lemniscate ratio 
    (Chorley et al; (1957) <doi:10.2475/ajs.255.2.138>), enamel-dentine distance
    (Guy et al. (2015) <doi:10.1371/journal.pone.0138802>; Thiery et al. (2017) 
    <doi:10.3389/fphys.2017.00524>), absolute crown strength (Schwartz et al. 
    (2020) <doi:10.1098/rsbl.2019.0671>), relief rate (Thiery et al. (2019)
    <doi:10.1002/ajpa.23916>) and area-relative curvature; draw cumulative
    profiles of a topographic variable; and map a variable over a 3d triangle 
    mesh.

Provides a parallel backend for the %dopar% function using
        the parallel package.

Provides information on drug names (brand, 
    generic and street) for drugs tracked by the DEA. There are functions that 
    will search synonyms and return the drug names and types. The vignettes 
    have extensive information on the work done to create the data for the package.