Showcase example instances of Apache Answers

## Problem

I'm choosing between Apache Answers and a competitor, and I'm struggling to imagine how well it might serve my organization's particular needs. The only example I know of is the Apache Answers Meta.

## A solution I'd like

I want to see a showcase of examples of Apache Answer used well.

To show what I mean, Discourse has a [Customers page](https://discourse.org/customers) where prospective adopters can see it in action.

Examples may
* Show off rare features
* Show how Apache Answers can be customized and styled
* Highlight what to do or not to do (if marked appropriately)
* Show how the core features of Apache Answers can sit sit-by-side with other needs clients might have, such as external navigation, announcements, community guidelines, links between categories and corresponding products, and other non-question-and-answer content.

## Alternatives I've considered

A blog or forum post with links to instances that the maintainers of Apache Answers would be very helpful and a good stopgap.

Inizia dall’issue #333, confronta lo showcase richiesto con la pagina Customers di Discourse e analizza l’istanza Apache Answers Meta menzionata nell’issue. Il lavoro è completo quando fornisce ai potenziali adottanti esempi di Apache Answers in uso, tramite uno showcase oppure la soluzione provvisoria blog/forum proposta, con esempi che coprano la personalizzazione e le esigenze più ampie dei siti.

Scritto dal modello di indicizzazione a partire dal testo della issue.