This is a dump of software and sites that I find cool or usefull. :-)
BleachBit - BleachBit is a free and open-source disk space cleaner, privacy manager, and computer system optimizer.
DosBox - DOSBox is a DOS-emulator that uses the SDL-library which makes DOSBox very easy to port to different platforms. DOSBox has already been ported to many different platforms, such as Windows, BeOS, Linux, MacOS X.
Disk2vhd - Disk2vhd is a utility that creates VHD (Virtual Hard Disk - Microsoft's Virtual Machine disk format) versions of physical disks for use in Microsoft Virtual PC or Microsoft Hyper-V virtual machines (VMs). The difference between Disk2vhd and other physical-to-virtual tools is that you can run Disk2vhd on a system that’s online.
FreeIPA - An open source AD, FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 Directory Server, MIT Kerberos, NTP, DNS, Dogtag (Certificate System). It consists of a web interface and command-line administration tools.
Home Assistant - Home Assistant is an open-source home automation platform running on Python 3. Track and control all devices at home and automate control. Perfect to run on a Raspberry Pi.
HPing - hping is a command-line oriented TCP/IP packet assembler/analyzer. The interface is inspired to the ping(8) unix command, but hping isn't only able to send ICMP echo requests. It supports TCP, UDP, ICMP and RAW-IP protocols, has a traceroute mode, the ability to send files between a covered channel, and many other features.
libvert - libvirt is an open-source API, daemon and management tool for managing platform virtualization. It can be used to manage KVM, Xen, VMware ESX, QEMU and other virtualization technologies.
Qcow2 - qcow is a file format for disk image files used by QEMU, a hosted virtual machine monitor. It stands for "QEMU Copy On Write" and uses a disk storage optimization strategy that delays allocation of storage until it is actually needed.
TCPDump - tcpdump is a common packet analyzer that runs under the command line. It allows the user to display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.
TripWire - Open Source Tripwire is a free software security and data integrity tool for monitoring and alerting on specific file change(s) on a range of systems
Wireguard - WireGuard is an extremely simple yet fast and modern VPN that utilizes state-of-the-art cryptography.
ZoneMinder - A full-featured, open source, state-of-the-art video surveillance software system.
Zurmo CRM - Zurmo is an Open Source Customer Relationship Management (CRM) application that is mobile, social, and gamified.