Top 5 C++ syntax-highlighting Projects

Notepad3

9 4,638 9.6 C++

Notepad like text editor based on the Scintilla source code. Notepad3 based on code from Notepad2 and MiniPath on code from metapath. Download Notepad3:
notepad2

7 2,263 9.5 C++

Notepad2-zufuliu is a light-weight Scintilla based text editor for Windows with syntax highlighting, code folding, auto-completion and API list for many programming languages and documents, bundled with file browser plugin metapath-zufuliu.

Project mention: Buffer Overflows in Notepad++ | news.ycombinator.com | 2023-08-30

My search for "notepad2" came up with https://github.com/zufuliu/notepad2, which sees routine changes: https://github.com/zufuliu/notepad2/commits/main

WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
ImGuiColorTextEdit

6 1,324 0.0 C++

Colorizing text editor for ImGui
replxx

6 667 0.0 C++

A readline and libedit replacement that supports UTF-8, syntax highlighting, hints and Windows and is BSD licensed.
better-cpp-syntax

1 147 4.9 C++

💾 The source of VS Code's C++ syntax highlighting
InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).