I'm writing some programs in C that will run in a distributed environment. Is there anything like an application server for C that provides clustering, monitoring, logging, etc?
Application servers are more like a Java and Python and OOP thing. But surely there are "object request broker" models that are implemented in C, just can just add the libraries to your C program. You can provide us a little more details about your environment, I use Visual Studio on Windows and the clang compiler and gcc on Linux and SunOS. If you study the Q&A on various programming sites here, like SO that are tagged C programming and application server you will broaden and deepen your knowledge.