The website has many broken images

[cristan]

The first search result on Google for kluent is https://markusamshove.github.io/Kluent/

You are then greeted by not-working images

That doesn't really imply a very well maintained library.

Not working images:
Download:
https://api.bintray.com/packages/markusamshove/maven/kluent/images/download.svg

MacOS / Linux
https://travis-ci.org/MarkusAmshove/Kluent.svg?branch=master

The windows one works, but says build unknown:
https://ci.appveyor.com/api/projects/status/c8j2nkwb5nc8b55a?svg=true