Inqlude provides a comprehensive listing of all existing libraries for developers of applications using the Qt toolkit. Inqlude is run by the community and open for contributions.
High-level multithreading framework
ThreadWeaver is a helper for multithreaded programming. It uses a job-based interface to queue tasks and execute them in an efficient way.
You simply divide the workload into jobs, state the dependencies between the jobs and ThreadWeaver will work out the most efficient way of dividing the work between threads within a set of resource limits.