The goal of rwththeme is to have a unified look and feel in ggplot2 plots.
You can install the released version of rwththeme github with
install.packages("devtools")
devtools::install_github("sumidu/rwththeme")
Using the theme is as simple as attaching the package.
# Using ggplot2 as a plotting library
library(ggplot2)
library(rwththeme)
ggplot(diamonds) + aes(carat,depth) + geom_point()