The OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.
See the Table of Hardware for supported devices. For more information about OpenWrt project organization, see the About OpenWrt pages.

iPXE is the leading open source network boot firmware. It provides a full PXE implementation enhanced with additional features such as:
- boot from a web server via HTTP
- boot from an iSCSI SAN
- boot from a Fibre Channel SAN via FCoE
- boot from an AoE SAN
- boot from a wireless network
- boot from a wide-area network
- boot from an Infiniband network
- control the boot process with a script
You can use iPXE to replace the existing PXE ROM on your network card, or you can chainload into iPXE to obtain the features of iPXE without the hassle of reflashing.
iPXE is free, open-source software licensed under the GNU GPL (with some portions under GPL-compatible licences), and is included in products from several network card manufacturers and OEMs.

Tasmota ist eine kostenfreie alternative Firmware für Geräte die auf dem ESP8266 Chip basieren, das sind solche von Sonoff und vielen weiteren Herstellern. Das Projekt startete offiziell im Januar 2017 von Theo Arends und wurde entwickelt um die Geräte einfach in sämtliche Smarthome Systeme einbinden zu können. Übrigens bedeutet Tasmota Theo-Arends-Sonoff-MQTT-OTA.
Tasmota befreit deine Geräte von undurchsichtiger Software um ihnen zu ermöglichen in Systemen zu funktionieren für die sie nie vorgesehen waren!
Obendrein erlaubt dir das deine Geräte unter einem Dach laufen zu haben und dein Smarthome und Zuhause zu vereinfachen.
Gluon is a modular framework for creating OpenWrt-based firmware images for wireless mesh nodes. Several Freifunk communities in Germany use Gluon as the foundation of their Freifunk firmware.Freifunk
Introducing Talos™ II
Talos™ II — the world's first computing system to support the new PCIe 4.0 standard — also boasts substantial DDR4 memory, dual POWER9 CPUs, next-generation security, and a price that won't break the bank. Let the power of Talos™ II accelerate your computing!
Elixir ❤️ Embedded
Nerves is an open-source platform that combines the rock-solid BEAM virtual machine and Elixir ecosystem to easily build and deploy production embedded systems.

Tired of reinventing the wheel by implementing drivers for firmware again and again.
Not with LinuxBoot!
The NERF project is a collaboration with Ron Minnich at Google (creator of LinuxBIOS and coreboot) that aims to build an open, customizable, and slightly more secure firmware for server machines based on using Linux and Heads in the ROM to replace UEFI as the bootloader.
Unlike coreboot, NERF doesn't attempt to replace the chipset initialization code with opensource. Instead it retains the vendor PEI (Pre-EFI environment) code as well as the signed ACM (authenticated code modules) that Intel provides for establishing the TXT (trusted execution environment). The NERF firmware replaces the DXE (Driver Execution Environment) portion of UEFI with a few open source wrappers, the Linux Kernel and the Heads measured runtime.
This Wiki serves two main goals. It is a user guide for Nikon Hacker's software (Nikon Patch and Nikon Emulator), and also a repository for information gathered by Nikon Hacker members while modifying and reverse-engineering cameras and peripherals.
If you are already running RouterOS, upgrading to the latest version is simple. Just one click, and RouterOS will find the latest version, show you the changelog, and offer to upgrade. You can do this from Winbox, console, Webfig or QuickSet.
Alternatives Android ROM
CyanogenMod is a free, community built distribution of Android which greatly extends the capabilities of your device.