We have been using WebQA (desktop version of link checking tool) of Watchfire to QA our Web sites. Watchfire has ended support of this tool. We are looking for some alternatives. The enterprise version of this tool WebXM is expensive and seems overkill for link and accessibility checking.
Veeam is happy to provide a free NFR license (for 1 year, up to 10 users). This license allows for the non‑production use of Veeam Backup for Microsoft Office 365 in your home lab without any feature limitations.