clumsy is a Open Source Windows program in the Other category, developed by Chen Tao. The current version is 0.3; you can download it safely from its official source with the download button above.
Leveraging the awesome WinDivert, clumsy stops living network packets and capture them, lag/drop/tamper/.. the packets on demand, then send them away. Whether you want to track down weird bugs related to broken network, or evaluate your application on poor connections, clumsy will come in handy.
SHA-256: F50DC734148815831C67D9FC2C246C22D421C53DCEA51E26EEE905B0B2806C27
