The Bitfocus Companion software allows you to control a large number of devices with an Elgato Stream Deck or Web Interfaces.

For a full list of supported modules visit the Support List on the bitfocus website.

Some Include:

Blackmagic ATEM line, Hyperdeck, Multiview, SmartView, SmartScope, Teranex, Videohub
AJA HELO, Ki Pro, Ki Pro Ultra, Kumo
Here to Record H2R Graphics
VLC Media Player
MPC-HC Media Player Classic
OBS Studio (With Websocket Plugin installed on OBS Computer. See Downloads below.)
NewTek Tricaster, NDI Studio Monitor
Birddog Studio NDI / Mini, Visca
Sony Bravia, VISCA
Roku TV
VICREO Listener - a small program that sits on your machine waiting for incoming TCP commands. It uses pre-defined commands to simulate key presses on your machine
Octopus Show Control - Show control software with the capability to control devices via TCP/IP, UDP, HTTP, Serial, Art-Net and MIDI. Octopus Listener is a helper app that is installed on a remote computer. With the use of Octopus, it can control keynote, PowerPoint, send keystrokes, and do shell commands.
ProPresenter - Cross-platform (Mac and Windows) Presentation and Production application for live events.
vMix - Live Production and Streaming Software