Open Source software for a (Linux Enterprise) database server, http://www.oracle.com/technetwork/indexes/downloads/index.html Oracle, software downloads are free, and most come with a DL that allows you to use full versions of the products at no charge while developing and prototyping your applications, or for strictly self-educational purposes. Database Servers offer:
Database 12c Enterprise/Standard Editions
Including: Client, Grid Infrastructure, Examples, Gateways, more
Database 11g Enterprise/Standard Editions
Database 11g Express Edition
Audit Vault and Database Firewall
Berkeley DB
Big Data Connectors
Cluster Verification Utility
Database Mobile Server
Grid Infrastructure
ILM Assistant
Instant Client
MySQL
NoSQL Database
Rdb Products
R Distribution
Secure Backup
Secure Backup Cloud Module for Amazon S3
TimesTen In-Memory Database
Open Source software for a (Linux Enterprise) web server
Apache HTTP Server
Initially released in 1995, this is the most popular web server across the entire World Wide Web, currently used by around 60% of web domains. Its released under an Apache License, which requires preservation of the copyright notices and disclaimers, but doesn't require modified versions to be distributed using the same license. Though most prevalent on Unix-like operating system, it also runs on Windows, Mac OS X, and others.
Nginx
Nginx (pronounced "engine X") is the second most popular open source web server currently on the Internet. Though development only started in 2002, its currently used by over 6% of web domains. It is a lightweight HTTP server, and can also serve as a reverse proxy and IMAP/POP3 proxy server. It's licensed under a BSD-like license. It runs on UNIX, GNU/Linux, BSD, Mac OS X, Solaris, and Windows.
Open Source software for a (Linux Enterprise) file server
The Bacula
Bacula is a set of Open Source, computer programs that permit you (or the system administrator) to manage backup, recovery, and