tools to emulate network issues: latency, dropped packets, out-of-order packets

Google Chrome
The Google Chrome browser has some built-in support for network latency- hit F12 and see the Network tab.
BUT the network latency feature does NOT work with web sockets.

Fiddler
http://www.hanselman.com/blog/HowToSimulateALowBandwidthConnectionForTestingWebSitesAndApplications.aspx

http://helephant.com/2012/07/11/simulating-network-latency-with-fiddler/

clumsy
https://jagt.github.io/clumsy/
- simple to use, if low-level
- advanced features: dropped packets, out-of-order packets

NEWT (Network Emulator for Windows Toolkit)
https://blogs.technet.microsoft.com/juanand/2010/03/05/standalone-network-emulator-tool/
- network latency