Inititally the idea was to have a repository, for the personal.xlsb. Then it grew bigger. Then I read an article about Hungarian Notation and I have decided to use it. Then I read what Joel thought about it and it and I have decided to abandon it completely. Now it is pretty much anything good that I write, that could be reused, so I do not have to reinvent the wheel every day. If I have to reuse it, I sometimes change the naming convention, avoiding the bad Hungarian notation and the bad_naming_with_underscores_which_i_was_using_before. One day (probably never), when I have time I would group them in a better way. Until then, I would use the search option.
Good luck, have fun from VitoshAcademy
Feel free to make pull requests, I would take a look at each one of them.