For free/open-source, try (graphical edits) or PDFsam (split/merge).
Adobe no longer provides technical support, security updates, or product patches for this version. Consequently, using "repack" versions or third-party download links carries significant risks. Spiceworks Community Risks of Downloading "Repack" Versions Security Vulnerabilities adobe acrobat xi pro 110 23 repack download link
if you're in a business or educational environment—some companies maintain legacy licenses for older versions. but security risks remain.
: For viewing and basic PDF management, the latest free version is available on the Adobe Reader download page . Accessing Older Versions (Licensed Users) adobe acrobat xi pro 110 23 repack download link
For legacy system compatibility (e.g., Windows 7/XP), you might run an older licensed version offline, but security risks remain.