R markdown
R markdown is used to integrate output from R to Word / html / pdf. The advantage of writing dynamic reports in markdown is that you can easily update your data, change your analyses and integrate output in your report. An example of a report written in R markdown can be seen here.
First you need to install the rmarkdown and the knitr package. An introduction to the use of markdown is given in this video
Links to an external site.(26 min, you may need only the first 10 to get an impression of how it works) or from the R markdown official homepage
Links to an external site..
An example of a Word document produced with R markdown is given here (and the Rmd-file to produce the document is given here).
An example of a html using more features is given here and the Rmd file is given here