Any open source SRO stuff that I can look at and maybe work on?

[Falaky]

I am a long time SRO enjoyer. I haven't really meddled with working on Silkroad private servers before but I am a bit interested.

I am already an experienced C++ developer (I write C++ professionally) with some experience in reverse engineering. I am mostly interested in projects that contribute directly to the making of a private server, *not* tools (bots and the like).

[YuBeDev]

Well, afaik, theres just single open source project that meets your requirements
Theres also open source filter but its in C#, so you might need to start your own filter project in C++ if you wish so.

Well, there is also remake of silkroad client in rust, just for your information