The following commands were run to find the number of files related to Truffle products based on a case-insensitive search:
➜ ethereumbook git:(develop) ✗ git grep -i --files-with-matches 'truffle' | wc -l
51
➜ ethereumbook git:(develop) ✗ git grep -i --files-with-matches 'ganache' | wc -l
13
➜ ethereumbook git:(develop) ✗ git grep -i --files-with-matches 'drizzle' | wc -l
0
The results of these commands without piping to line-count are in their respective text files in this gist.