best macros and macro resources for Libre Office?

users
#1

Greetings,

in the next days I will write a tutorial for a magazine about macros,
aimed to beginners. In this context, any feedback (here on the list,
so we can share) on the points below is welcome:

- your favourite/most useful/most used macro?

- did you ever find a Libreoffice/OpenOffice macro online which you
  wanted to run on your computer, but were unable to? If yes,which
  one, and why?

- (For the links section) which resource you would recommend first to
  complete novices who want to write a PORTABLE macro (e.g. working
  both on Libreoffice and OpenOffice, on any operating system)

Thanks in advance for any feedback,

       Marco