TrinityCore uses (parts of or in whole) the following opensource software:

argon2
  https://github.com/P-H-C/phc-winner-argon2
  Version: 62358ba

Boost (a set of C++ libraries)
  http://www.boost.org
  Version: external

bzip2 (a freely available, patent free, high-quality data compressor)
  http://www.bzip.org/
  Version: 1.0.6

catch2
  https://github.com/catchorg/Catch2
  Version: v2.13.0

efws (Entropia File System Watcher - crossplatform file system watcher)
  https://bitbucket.org/SpartanJ/efsw
  Version: 1.0.0 e6afbec564e249771046c714b0c7f2154e4c7fef

fmt (a small, safe and fast formatting library)
  https://github.com/fmtlib/fmt
  Version: 7.1.3 https://github.com/fmtlib/fmt/releases/tag/7.1.3

G3D (a commercial-grade C++ 3D engine available as Open Source (BSD License)
  http://g3d.sourceforge.net/
  Version: 9.0-Release r4036

gSOAP (a portable development toolkit for C and C++ XML Web services and XML data bindings)
  http://gsoap2.sourceforge.net/
  Version: 2.8.117

jemalloc (a general-purpose scalable concurrent malloc-implementation)
  http://www.canonware.com/jemalloc/
  Version: 5.2.1

libMPQ (a library for reading MPQ files)
  https://github.com/mbroemme/libmpq/
  Version: d59b4cf1d107b5f6a0f67d6bc545c6c6ebef3d74

MariaDB:
  https://mariadb.org/
  Version: external

OpenSSL (general-purpose cryptography library)
  https://www.openssl.org/
  Version: external

rapidjson (A fast JSON parser/generator for C++ with both SAX/DOM style API http://rapidjson.org/)
  https://github.com/Tencent/rapidjson
  Version: 27c3a8dc0e2c9218fe94986d249a12b5ed838f1d

readline (command line editing library)
  https://cnswww.cns.cwru.edu/php/chet/readline/rltop.html
  Version: external

recastnavigation (Recast is state of the art navigation mesh construction toolset for games)
  https://github.com/recastnavigation/recastnavigation
  Version: 54bb0943e5174a71eeeca11919920f685760a4f0
  Custom changes: https://github.com/TrinityCore/recastnavigation/tree/3.3.5

StormLib (a pack of modules, written in C++, which are able to read and also to write files from/to the MPQ archives)
  http://www.zezula.net/en/mpq/stormlib.html
  Version: 8.04

utf8-cpp (UTF-8 with C++ in a Portable Way)
  https://github.com/nemtrif/utfcpp
  Version: 3.2.3

zlib (A Massively Spiffy Yet Delicately Unobtrusive Compression Library)
  http://www.zlib.net/
  Version: 1.2.12

MinHook (The Minimalistic x86/x64 API Hooking Library for Windows)
  https://github.com/TsudaKageyu/minhook
  Version: 0f25a2449b3cf878bcbdbf91b693c38149ecf029

argon2
  https://github.com/P-H-C/phc-winner-argon2
  Version: 62358ba