Recognizing the need to write reactor-based GUI applications, the ACE community has created several reactor extensions for use with X Window System. Each of these extends the ACE_Select_Reactor to work with a specific toolkit. By using these reactors, your GUI application can remain single threaded yet still respond to both GUI events, such as button presses, and your own application events.

This package forms part of the Boost C++ Libraries collection.

primecount is a free software program and C/C++ library that counts the primes below an integer x <= 10^31 using highly optimized implementations of the combinatorial prime counting algorithms.