Hotpatch is a library that can be used to dynamically load a shared library (.so) file on Linux from one process into another already running process without affecting the execution of the target process. The API is a C API, but also supported in C++. The user can load his/her own .so file into an already running process, invoke a custom symbol/function in that .so file, and pass arguments to that function as long as it is serialized to the form of a byte buffer and length of the buffer.
Wisecracker is a high performance distributed cryptanalysis framework that leverages GPUs and multiple CPUs. It allows security researchers to write their own cryptanalysis tools that can distribute brute-force cryptanalysis work across multiple systems with multiple multi-core processors and GPUs. Security researchers can also use the sample tools provided out-of-the-box. The differentiating aspect of Wisecracker is that it uses OpenCL and MPI together to distribute the work across multiple systems, each having multiple CPUs and/or GPUs.