The donguri source code is about 20,000 lines of Haskell.
The new IOS smartphone app is about 10,000 lines of Swift.
Read.cgi is about 2,000 lines of Haskell.
itest is more than 10,000 lines of javascript.
bbs.cgi is approximately 10,000 lines of perl.
headline v2 is about 5,000 lines of Haskell.

I also made an interesting new system for BE, but it is not released yet.
Maybe version 1.1 of the ios app will include it.

Sometimes I feel dizzy when I switch between code bases.
Luckily, itest and bbs.cgi are maintained by others, but I am very familiar with the code.