I am looking for a C or C++ library that includes several well-known compression algorithms (particularly lossless ones), for the purpose of developing a custom compression scheme and comparing it to generic solutions. I have found one, called Basic Compression Library, but it does not seem to have been updated since 2006. I found a paper about another, called ExCom, that was published in 2010, but the website doesn't have a download link.
Are there other similar libraries that have been updated more recently and/or include more algorithms? Or is there a reason why they don't exist?