httr 1.2.0 adds RETRY() for unreliable APIs with exponential backoff, and fixes POST redirect issues
tibble 1.1 introduces tibble(), as_tibble(), and is_tibble() naming, plus safer column extraction with warnings
xml2 1.0.0 adds XML creation and modification, xml_find_first() for ragged data, and easier namespace handling
dplyr 0.5.0 adds coalesce(), if_else(), case_when(), recode(), and the summarise_all/at/if family of functions
tidyr 0.5.0 adds separate_rows() for delimiter-separated values, plus sep arguments for spread() and unnest()
Introducing flexdashboard: create interactive dashboards with R Markdown, htmlwidgets, and optional Shiny components
New tutorial series on creating custom JavaScript widgets for Shiny using libraries like c3.js, d3.js, and intro.js
Videos from the 2016 Shiny Developer Conference covering reactive programming, modules, gadgets, and debugging
testthat 1.0.0 adds pipe support, new expectations, consistent side-effect testing, and C++ unit testing with Catch
Introducing Feather: a fast binary file format for data frames that works in both R and Python, built on Apache Arrow
Introducing the tibble package: modern data frames with better printing, stricter subsetting, and no string-to-factor conversion
Overview of custom R Markdown formats (tufte, rticles, rmdformats) and how to create your own output formats
R Markdown 0.9.5 adds floating table of contents, code folding, tabbed sections, and five new HTML themes
Improved R support on Travis-CI with container-based infrastructure, package caching, and multiple R versions
ggplot2 2.1.0 fixes bugs from 2.0.0 with better histogram binning, consistent argument ordering, and alpha behavior
devtools 1.10.0 improves Windows RTools detection, adds use_news_md() and use_mit_license(), with lazy GitHub installs
httr 1.0.0 switches from RCurl to curl for reliability; 1.1.0 improves error messages and OAuth support
memoise 1.0.0 caches function results with better printing, argument forwarding, and time-based invalidation
tidyr 0.4.0 introduces nested data frames with nest()/unnest() and complete() for making implicit missing values explicit
Shiny 0.13.0 introduces Gadgets for interactive tools, HTML templates, modules for managing complexity, and stack traces
