* [i-doit](http://www.i-doit.org/) - Open Source IT Documentation and CMDB.
* [iTop](http://www.combodo.com/-Overview-.html) - A complete open source, ITIL, web based service management tool.
* [iTop](http://www.combodo.com/-Overview-.html) - Complete open source, ITIL, web based service management tool.
* [Ralph](https://github.com/allegro/ralph) - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks.
* [Sicekit](https://github.com/sicekit/sicekit) - The systems & infrastructure encyclopedia toolkit (based on mediawiki).
* [Clusto](https://github.com/clusto/clusto) - Helps you keep track of your inventory, where it is, how it's connected, and provides an abstracted interface for interacting with the elements of the infrastructure.
@ -220,14 +219,6 @@
* [Virtualmin](http://www.virtualmin.com/) - Control panel for Linux based on webmin.
* [ZPanel](http://www.zpanelcp.com/) - Control panel for Linux, BSD, and Windows.
* [Cyrus IMAP/POP3](http://cyrusimap.org/) - Intended to be run on sealed servers, where normal users are not permitted to log in.
* [Dovecot](http://www.dovecot.org/) - IMAP and POP3 server written primarily with security in mind.
* [Qpopper](http://www.eudora.com/products/unsupported/qpopper/) - One of the oldest and most popular server implementations of POP3.
### MTA (SMTP)
*Mail Transfer Agents (SMTP servers).*
* [Exim](http://www.exim.org/) - Message transfer agent (MTA) developed at the University of Cambridge.
* [Haraka](http://haraka.github.io/) - A high-performance, pluginable SMTP server written in JavaScript.
* [MailCatcher](http://mailcatcher.me/) - Ruby gem that deploys a simply SMTP MTA gateway that accepts all mail and displays in web interface. Useful for debugging or development.
* [Maildrop](https://github.com/m242/maildrop) - Open Source disposable email SMTP server, also useful for development.
* [OpenSMTPD](https://opensmtpd.org/) - Secure SMTP server implementation from the OpenBSD project.
* [Postfix](http://www.postfix.org/) - Fast, easy to administer, and secure Sendmail replacement.
* [Sendmail](http://www.sendmail.com/sm/open_source/) - Message transfer agent (MTA).
### complete solutions
*Software for simple deployment of a mail server, e.g. for inexperienced or impatient admins.*
* [Mail-in-a-Box](https://mailinabox.email/) - Take back control of your email with this easy-to-deploy mail server in a box.
* [iRedMail](http://www.iredmail.org/) - Full-featured mail server solution based on Postfix and Dovecot.
## Monitoring
*Monitoring software.*
@ -383,19 +417,6 @@ Comparison of NoSQL servers: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-v
* [Doozerd](https://github.com/ha/doozerd) - Doozer is a highly-available, completely consistent store for small amounts of extremely important data.
* [ZooKeeper](http://zookeeper.apache.org/) - ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.
## SMTP
*SMTP servers.*
* [Exim](http://www.exim.org/) - Message transfer agent (MTA) developed at the University of Cambridge.
* [Haraka](http://haraka.github.io/) - A high-performance, pluginable SMTP server written in JavaScript.
* [MailCatcher](http://mailcatcher.me/) - Ruby gem that deploys a simply SMTP MTA gateway that accepts all mail and displays in web interface. Useful for debugging or development.
* [Maildrop](https://github.com/m242/maildrop) - Open Source disposable email SMTP server, also useful for development.
* [OpenSMTPD](https://opensmtpd.org/) - Secure SMTP server implementation from the OpenBSD project.
* [Postfix](http://www.postfix.org/) - Fast, easy to administer, and secure Sendmail replacement.