[gaetan]

One solution is to host your own NAS. Synology e.g. provide for their NAS multiple services that might replace some Google Apps: Mail server (Gmail), CalDAV support (Google Calendar), Cloud Station (Google Drive/Dropbox), Photo Station (Picasa), Audio Station (Google Play),… all these with VPN connections. And you can easily install some productivity tools like CRM, wiki, Wordpress, Zafara…

[pknight]

It doesn't come prepackaged with apache/php/mysql does it? I take it one would have to install those. Tonido does most of these things, but there are some limitations/complications when trying to install your own stuff I believe.