Suggestions for vibe.d article topics

[Dicebot]

Cross-post from vibe.d newsgroup : 
http://forum.rejectedsoftware.com/groups/rejectedsoftware.vibed/thread/1434/

I have been doing some lazy writing on vibe.d topic. Aim is to 
get series of articles that can get reader familiar with vibe.d 
idioms and highlight use cases currently not presented properly 
in documentation (or hard to find there). Found myself in quite 
paradoxical situation though - while being quite familiar with 
vibe.d sources and behavior, I don't to any practical web 
development on my own and lack real-world use cases to highlight. 
After some introduction articles, I have done a small overview of 
REST module and working with MongoDB is planned next (those two I 
have used extensively during my experiments). But I'd like to 
hear suggestions on other idiomatic small applications that are 
worth writing about, preferably something that is not obvious 
from vibe.d/examples/

This may be proposed later via pull request as an official doc 
improvement. Please consider both advanced D users and complete 
newbies interests.

First introductory articles can be found here : 
http://dicebot.blogspot.com/ , improvement suggestions for old 
stuff are also welcome.