There are many alternatives to Ultimate Gamepad for Linux if you are looking for a replacement. The best Linux alternative is Unified Remote, which is free. If that doesn't suit you, our users have ranked more than 10 alternatives to Ultimate Gamepad and six of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Ultimate Gamepad are Ultimate Control (Freemium), Wifipad (Free), Pcon (Free, Open Source) and nJoy (Paid).
Unified Remote is an app that lets you control your entire computer from your mobile device. In short, it turns your device into a WiFi or Bluetooth remote control for all the programs on your computer. It is easily the most feature-filled Mobile-PC remote available.
WifiPad transforms your iPhone/iPod Touch into a wireless gamepad. It simulates keyboard events on a computer running the WifiPad Server over the Wifi network. It works with any games that accepts keyboard keys as input.
nJoy is a complete PC remote controlling solution! FEATURES - nJoy includes a gaming joystick layout and a comprehensive desktop control - layout consist of media controls, web surfing and text input options - efficient and easy to use mouse controls