Bedrock Edition server software

Unlike the official server software, the unofficial  server software usually lack many things that are present in Bedrock Edition vanilla server that are built into the Bedrock Edition's client. The servers, excluding the official Bedrock Server Software, are also free of Mojang source code. In many cases, server software can outperform the official server software and can provide features beyond the capabilities of the vanilla bedrock server, like massive multiplayer experience. Unless stated otherwise, most server software are open-source, free of charge, and free-for-all use, including commercial use, given the license that's included.

Most Bedrock Edition server networks, including the featured servers, uses unofficial software as Mojang's official server software for Bedrock Edition has only been recently released and is currently in public alpha testing.

Official Server Software
On September 11, 2018, Mojang released an early alpha version of the official Bedrock Edition server software, Bedrock Dedicated Server, announced by Jeb on his twitter page.

Modded BDS
This allow you run native mods or the official plugins written in js.

Comparison
This is a comparison of available custom servers for the Bedrock Edition of Minecraft. Servers that are listed here are required to have at least one publicly accessible release.

Proxy software list
Proxies allow transferring of players seamlessly between servers unlike the Transfer Packet.

Protocol Translator list
Protocol translators allow Bedrock Edition clients to connect to Java Edition servers.