There are 3 repositories under hexrays topic.
A Coverage Explorer for Reverse Engineers
A Trace Explorer for Reverse Engineers
An Interactive Binary Patching Plugin for IDA Pro
An Interactive Hex-Rays Microcode Explorer
Hexrays Toolbox - Find code patterns within the Hexrays ctree
HexRays ctree visualization plugin
An AVX Lifter for the Hex-Rays Decompiler
The CrowdDetox plugin for Hex-Rays automatically removes junk code and variables from Hex-Rays function decompilations.
IdaClu is a version agnostic IDA Pro plugin for grouping similar functions. Pick an existing grouping algorithm or create your own.
Hexrays decompiler plugin that colorizes and filters the decompiler's output based on regular expressions
MrsPicky - An IDAPython decompiler script that helps auditing memcpy() and memmove() calls
Various scripts for the Hexrays decompiler
Run IDA scripts headlessly.
Hex-Rays Decompiler plugin for better code navigation. Add support ida7.0/7.1/7.2 for macOS
IDA 7.x VisualStudio 2017 Sample Project for IDA and HexRays plugins (works with Community Edition)
MBBSDASM Hex-Rays IDA IDS/IDT Files for MajorBBS/Worldgroup Modules
Hex-Rays Decompiler plugin for better code navigation. plugin for IDA Pro.