person(given = "Kirill", family = "Müller", role = c("aut",
        "cre"), email = "krlmlr+r@mailbox.org")

Robust, reliable and flexible paths to files below a
    project root. The 'root' of a project is defined as a directory
    that matches a certain criterion, e.g., it contains a certain
    regular file.

testthat, mockr, knitr, withr, rmarkdown

'rrmake.R' 'criterion.R' 'file.R' 'has-file.R' 'root.R'
'rprojroot-package.R' 'shortcut.R' 'thisfile.R'

Tools for package development, administration and documentation.

codetools, methods, xml2, curl, commonmark

Reimplementations of Functions Introduced Since R-3.0.0

c(person("Michel", "Lang", NULL, "michellang@gmail.com",
      role = c("cre", "aut"), comment = c(ORCID = "0000-0001-9754-0393")))

Implementations of functions which have been introduced in
    R since version 3.0.0. The backports are conditionally exported which
    results in R resolving the function names to the version shipped with R (if
    available) and uses the implemented backports as fallback. This way package
    developers can make use of the new functions without worrying about the
    minimum required R version.

Encapsulated Classes with Reference Semantics

person("Winston", "Chang", role = c("aut", "cre"), email = "winston@stdout.org")

Creates classes with reference semantics, similar to R's built-in
    reference classes. Compared to reference classes, R6 classes are simpler
    and lighter-weight, and they are not built on S4 classes so they do not
    require the methods package. These classes allow public and private
    members, and they support inheritance, even when the classes are defined in
    different packages.

knitr, microbenchmark, pryr, testthat, ggplot2, scales

A Wrapper of the JavaScript Library 'DataTables'

c(
    person("Yihui", "Xie", email = "xie@yihui.name", role = c("aut", "cre")),
    person("Joe", "Cheng", role = "aut"),
    person("Xianying", "Tan", role = "aut"),
    person("JJ", "Allaire", role = "ctb"),
    person("Maximilian", "Girlich", role = "ctb"),
    person("Greg", "Freedman Ellis", role = "ctb"),
    person("Johannes", "Rauh", role = "ctb"),
    person("jQuery contributors", role = c("ctb", "cph"), comment = "jQuery in htmlwidgets/lib"),
    person("SpryMedia Limited", role = c("ctb", "cph"), comment = "DataTables in htmlwidgets/lib"),
    person("Brian", "Reavis", role = c("ctb", "cph"), comment = "selectize.js in htmlwidgets/lib"),
    person("Leon", "Gersen", role = c("ctb", "cph"), comment = "noUiSlider in htmlwidgets/lib"),
    person("Bartek", "Szopka", role = c("ctb", "cph"), comment = "jquery.highlight.js in htmlwidgets/lib"),
    person("RStudio, PBC", role = "cph")
    )