Basic

• The 10K problem – http://www.kegel.com/c10k.html

Libraries

• libevent – http://libevent.org/
• libev – http://software.schmorp.de/pkg/libev.html
• libuv – http://libuv.org/

References

• Lugdunum (edonkey server) – http://lugdunum.shortypower.org/kiten.html
• A Million-user Comet Application with Mochiweb – http://www.metabrew.com/article/a-million-user-comet-application-with-mochiweb-part-1
• 600k concurrent websocket connection on AWS using node.js – https://blog.jayway.com/2015/04/13/600k-concurrent-websocket-connections-on-aws-using-node-js/
• [Hacker News Discussion] 600k concurrent… – https://news.ycombinator.com/item?id=21222913

Network Library

• RakNet – http://www.jenkinssoftware.com/
• Valve GameNetworkingSockets – https://github.com/ValveSoftware/GameNetworkingSockets
• ENet (Reliable UDP networking library) – http://enet.bespin.org/
• UDT (UDP-based Data Transfer) – http://udt.sourceforge.net/

LEDBAT (Low Extra Delay Background Transport)

• uTP – http://www.utorrent.com/documentation/utp
• IETF LEDBAT Status Page – http://tools.ietf.org/wg/ledbat/
• libutp – https://github.com/bittorrent/libutp

RFC

• RFC 5128 (State of P2P Communication across NATs) – http://tools.ietf.org/html/rfc5128
• RFC 2663 (IP Network Address Translator (NAT) Terminology and Considerations) – http://tools.ietf.org/html/rfc2663
• RFC 4787 (Network Address Translation (NAT) Behavioral Requirements for Unicast UDP) – http://tools.ietf.org/html/rfc4787
• RFC 3022 (Traditional IP Network Address Translator (Traditional NAT)) – http://tools.ietf.org/html/rfc3022

UPnP

• UPnP Specifications – http://upnp.org/sdcps-and-certification/standards/
• [Intel] Developer Tools for UPnP – http://opentools.homeip.net/dev-tools-for-upnp
• [MSDN] UPnP APIs – http://msdn.microsoft.com/en-us/library/aa382303(VS.85).aspx
• MiniUPnP library – http://miniupnp.tuxfamily.org/
• libnatpmp library – http://miniupnp.tuxfamily.org/libnatpmp.html

Misc.

• [MSDN] ICS(Internet Connection Sharing) / ICF(Internet Connection Firewall) – http://msdn.microsoft.com/en-us/library/aa364733(v=VS.85).aspx
• Peer-to-peer communication across Network Address Translators – http://www.brynosaurus.com/pub/net/p2pnat.pdf

Microsoft Windows

• MSDN: Programming Guide for 64-bit Windows – http://msdn.microsoft.com/en-us/library/bb427430(VS.85).aspx
• Getting Ready for 64-bit Windows – http://msdn.microsoft.com/en-us/library/aa384198(VS.85).aspx
• Designing 64-bit-Compatiable Interfaces – http://msdn.microsoft.com/en-us/library/aa384167(VS.85).aspx
• MSDN: 64-bit programming for Game Developers – http://msdn.microsoft.com/en-us/library/bb147385.aspx
• MSDN: Introduction to Developing Applications for the 64-bit Itanium-based Version of Windows – http://msdn.microsoft.com/en-us/library/ms952405.aspx
• MSDN: 64-Bit Programming with Visual C++ – http://msdn.microsoft.com/en-us/library/h2k70f3s.aspx
• Best Practices for WOW64 – http://www.microsoft.com/whdc/system/platform/64bit/WoW64_bestprac.mspx
• Accessing 32-bit DLLs from 64-bit code – http://dnjonline.com/article.aspx?ID=jun07_access3264
• 64-Bit Programming with Visual C++ – http://blogs.msdn.com/brunoterkaly/archive/2009/01/12/64-bit-programming-with-visual-c.aspx
• FAQ for Development on 64-bit Windows – http://msdn.microsoft.com/en-us/isv/bb190527.aspx

• CUnit – http://cunit.sourceforge.net/
• CUnitWin32 – http://code.google.com/p/cunitwin32/
• CppUnit – http://sourceforge.net/projects/cppunit
• CUT (C Unit Tester) – http://sourceforge.net/projects/freshmeat_cut/
• GoogleTest – http://code.google.com/p/googletest/
• TUT – http://tut-framework.sourceforge.net/
• UnitTest – http://devmentor.org/#UnitTest
• UnitTest++ – http://unittest-cpp.sourceforge.net/
• Unit++ – http://unitpp.sourceforge.net/
• WinUnit – http://msdn.microsoft.com/en-us/magazine/cc136757.aspx