Routers

Old but gold

Third party firmwares

Tomato

Tomato by Shibby running on a Linksys e3200

Tomato is a custom firmware known for it's simple and user friendly interface.

There are several forks of Tomato, the most famous are:

• Tomato by Shibby it's the most featureful one. The major features include a Torrent client (Transmission), Tor support, DNSCrypt support and miniDLNA.
• AdvancedTomato based on Tomato by Shibby, but uses a new interface.
• Tomato by Toastman Barebone version, if you think that your router should only route packets, and do that the best it can.
• Tomato RAF It's the version that supports more routers than everyone else. If your router is not supported by any other version, check this one.

While there are many forks, their developers constantly share code. Because of this, it's hard to find a feature that it's supported by only a specific version of Tomato.

OpenWRT

Official site

The OpenWRT wiki is not always updated, so when checking if your router is supported, always search in the forum too.

DD-WRT

Official site

Asuswrt-merlin

Asuswrt-merlin (Download) is a custom firmware based on Asuswrt, the opensource firmware used by recent Asus routers.

It supports the following models: RT-N16, RT-AC56U, RT-N66U, RT-AC66U, RT-AC68U.

Since it's based on Asuswrt, it uses the official webui, while adding several useful features, like SSH access, Cron jobs, customizable user scripts and several minor tweak/enchantments.