RTMP Tools

Command line tools

RTMPdump: https://rtmpdump.mplayerhq.hu
libcurl: https://curl.haxx.se/libcurl/c/CURLOPT_URL.html
ffmpeg: https://ffmpeg.org/
flvmeta: https://www.flvmeta.com

Network analysis

Wireshark: https://www.wireshark.org/

Libraries

Adobe RTMP SDK (available from Veriskope)
https://rtmpdump.mplayerhq.hu/librtmp.3.html (GPLv2)
- KSV patches - thread
- ossrs fork - claims to be more stable and more readable