Most charities already have tools. The problem is that the pieces don't join up, so no one can see whether the things trustees are responsible for are under control. Here's an honest look at how CharityControl compares to what you may use now.
A folder of documents and a chain of emails can hold a lot. What they can't do is tell you what needs attention, or keep a reliable record of who decided what.
Board portals are good at circulating papers before a meeting. Most stop there, and they charge for every trustee. CharityControl runs the meeting and the governance behind it.
Xero and QuickBooks handle the bookkeeping well. They don't cover governance, and they show money the way an accountant reads it, not the way a trustee needs it.
Free for the smallest charities, and a single per-charity price after that, with unlimited trustees and volunteers.