question: we invite everybody in this area to attend the show and meet debian people as well as people from other free software projects there.
Capitalize this past sentence correctly.
A: We invite everybody in this area to attend the show and meet Debian people as well as people from other Free Software projects there.

question: thank you and congratulations on the blog is serving me much!
Capitalize this past sentence correctly.
A: Thank you and congratulations on the blog is serving me much!

question: the evenings include both a multi-course menu / buffet in the restaurant or barbecue, various trips and the popular tombola.
Capitalize this past sentence correctly.
A: The evenings include both a multi-course Menu / buffet in the restaurant or barbecue, various trips and the popular tombola.