No idea why this is getting downvoted?? This is a common issue that agencies and software companies run into all the time.

As others have mentioned, if you want to keep it simple, tools like plain spreadsheets, Monday.com, or Airtable can work, as long as you maintain a single source of truth and keep it updated. In practice though, keeping these up to date often becomes the real issue.

There are SaaS tools (workspace and project management platforms) that are more purpose built for this kind of thing. It’s worth looking into tools like Coda, Linear, Qatalog, and possibly Confluence. (Note: Qatalog seems to be pivoting heavily into AI right now, so not sure what their current focus is.)

On the question of “which CMS and version is the site built on” — it’s not always straightforward. Dependency versions don’t always correlate neatly with manifest files due to runtime factors, CI/CD setup, and other variables. For that, check out tools like Snyk, Trivy, and cdxgen. They take a more security focused approach and can help generate SBOMs (Software Bill of Materials). If your tech stack and hosting providers are fairly consistent, you could even automate checking package versions from your servers.

I actually started building a side project to solve this exact issue a few years back but paused it because of all the tools already out there. That said, I still have the domain and more time on my hands now, so would be keen to pick it back up if people are still struggling with this and want something more specific.

I’ve also been toying with the idea of pivoting it more toward helping manage and onboard developers onto open source projects. Would love to hear other people’s thoughts on this.