Nick mentioned the function knitr::imgur_upload(), and this is one of the many little functions that I feel proud of in my packages. I love these little functions because they were relatively simple for me to write (at least the source code is usually very short), but can be surprisingly useful. This function can be used to upload an image file to imgur.com, and it returns the URL of the image.
After Jenny finished the reprex package, she discovered my formatR::tidy_eval() function, which actually used the similar idea as reprex. I wrote it a few years ago but just like other little functions, I rarely actively promote them, so unless you read the documentation very carefully, you probably won’t notice them. I plan to write more posts in the “One Little Thing” series in the future.
P. S. I wrote the imgur_upload() function in early 2012 (a few days after knitr was first released to CRAN), when my only choices was the packages RCurl and XML. If I were to write it today, I’d probably use httr or curl and xml2 instead. If you want to rewrite it using these “modern” packages, please feel free to submit a pull request on Github.