I recently read an article about Booktype, got interested and tried software myself.
To integrate Roundcube with ISPConfig 3 read requirements and follow installation instructions. Source code is available at GitHub
If you are looking for search engine software then try Yioop! It is PHP based and Open Source so it is very easy to deploy it on Intranet or remote dedicated server. You can try it directly at yioop.com
Most hosting providers doesn’t provide file manager application but there is an easy solution as you can use AjaXplorer. It a web based file management software (PHP based and Open Source application!).
I was searching for easy cloud service recently. My findings were less then satisfactory – just client applications, no WebDAV support or high prices. Then I found ownCloud.
For the last couple of days, I was searching for self-hosted bookmark management software and found a great solution that is under active development: SemanticScuttle.
Do you want to check DNS configuration?
I was testing a couple of solutions (as I posted earlier) to find a web-based media manager that suits me best. It took four days but finally, I decided to use one.