Some tangential analysis of Synapse over here: https://twitter.com/davkean/status/1144498663122558977 .
Mouse./keyboard customisation software seems universally bad / lowest-bidder style. Logitech's mouse button configuration tool for example weights over 400MB. Literally for a tool which requires a few dropdowns.
A home-made .NET-to-Java transpiler that requires custom builds of the CLR and JVM?
The 300MB of random data at the end of the Windows XP install CD?
An encrypted archive containing the set of folders comprising the entire source code history (the top level of which has an alarming number of entries named like "revert_v5_bug [Final] - ACTUAL CURRENT") (because some developer has OCD about backups)?