Collax Business Server is an all-in-one Linux server for small- and medium-sized businesses. It delivers all the important network services within a heterogeneous business environment for communication, infrastructure, compliance, groupware, and storage, all in a reliable and secure way which is easy to manage. It also provides essential security functions such as firewalling and virus and spam filtering, to protect against hacker attacks, viruses, and unsolicited email messages.
Proxmox is a Debian-based bundle of OpenVZ, KVM, and a Web based management GUI. It supports high-performance container-based virtualization of Linux workloads, as well as lower performance KVM hardware assisted virtualization. It supports any hardware that the Linux kernel supports, and will permit live migration of running OSIs with shared storage configurations (DRBD, CIFS, NFS, etc.). It comes bundled with many virtual appliance templates (Drupla, Moodle, FreePBX, etc.) and generic OSI appliances (Fedora, Debian, Ubuntu), as well as a faculty for building arbitrary Linux based appliances. It can be used for virtual desktop infrastructure (VDI) and virtual server infrastructure (VSI). It supports almost any x86/x64 OS in a KVM container and any Linux-based OS in OpenVZ.
launch2net for Linux is a mobile Internet connection manager for Asus Eee PCs running Linux. launch2net already includes connection settings for most mobile network operators worldwide, eliminating the need to search for and enter cryptic settings like user name, password, or APN address. launch2net for Linux will display the time and data consumption for the current session as well as for a period of time. The software supports many USB modems from leading manufacturers.
Monjo is a Web application that helps monitoring a small to medium network of servers. It offers easy customization of notifications in case of network failures and is designed to allow for easy addition of new services that need to be monitored. It's internationalized and includes a Web interface in English and German. It currently supports notifications by email and can check services using ping, SMTP, HTTP, POP3, and IMAP4.
uranos is a system that supports unattended installation of several varieties of Linux (kickstart, preseed, autoyast) and Windows (2000, XP, 2003, 2003 R2, Vista, 7, 8, 2008, 2012). It includes features for inventory, software management, DHCP-LDAP, DNS-LDAP, PHP-SSH, syslog-ng, switch management, an LDAP browser, PXE management, central cron management, and license management.
PDNSOps, is a Web-based script which aids in administering domains and records for the PowerDNS SQL name server software. It is targeted mainly toward individual domain owners, but should be robust enough to be used in a larger capacity by an ISP or other big host. For those who may not know, PowerDNS is a domain name server application, much like BIND, but offering alternative backends for the storage of domain information.
net-status-monitor is a simple console script to test whether Internet connectivity is working. If it is, the script tells you the external IP address (in case your dynamic DNS provider is down). If not, it tries to find the point where the connectivity fails. The output is quite simple, so you can put it on your grandmother's PC. "Just tell me what the read line says" should give you enough information.