I feel you Spaniard. Ironically most of these includes are made to make CODING easier. But why whould the author need that? He/she knows what he/she is doing... right?
Also, this section is for official AMXX related stuff. So nothing custom.
If you need help with a custom plugin, you post in the thread of that custom plugin from now on.
With all of that said, here are the includes:
Cromchat:
https://forums.alliedmods.net/showthread.php?t=295046
formatin() seems to be more or less format(ex)() but with a string return instead of supplying an output string.
It can be found in the download package of this plugin:
https://forums.alliedmods.net/showthread.php?t=293632