ATV495Max 4K HDR Android TV set top box

Geniatech sells the ATV495Max, a 4K HDR Android TV set top box, for less than 120$.

Huawei P10 Plus

The Huawei P10 Plus is an amazing Android phone with curved 2560*1400 screen, dual Leica camera, finger print reader, NFC, IR, USB-Type c and support for 2 SIM cards, or 1 SIM card and 1 microSD card. IMHO the best Android phone available right now! Update: don´t get the black matte version, as it becomes really hot within a few seconds in the sun. If you intend to use it outside in the sun, too, get yourself a white or silver version! BTW: the camera app has a special mode for using the phone as a document scanner. Very convenient!

AllBe1

The AllBe1 could be your all in one personal security guardian when it is available at Indiegogo for less than 50$.

Linux Infrared Remote Control

LIRC, Linux Infrared Remote Control, is a package that allows you to decode and send infra-red signals of many (but not all) commonly used remote controls.

Controlling AppleTV with a third-party remote control

From support.apple.com: Controlling AppleTV with a third-party remote control.

Sewell InjectIR, IR over HDMI for remote controls

The Sewell InjectIR extends the signal from your remote controls (for Blu-Rays, DVRs, set-top boxes, etc.) by sending the remote control's IR (infrared) signal over your HDTV's existing HDMI cable. Cost is less than 45$.

ri IR hardware

The ri is an infrared hardware dongle plus software to turn an iOS device into an IR remote control. All for less than 30$.

L5remote

The L5remote turns your iPhone or iPod touch into a learning universal IR remote control for less than 50$.

Fastmac iV Plus to use an iPhone as a remote control

The Fastmac iV Plus is a stylish iPhone case with battery, flashlight and infrared remote for less than 100$. It offers a second USB charging port to charge other USB devices, too. Should be available in spring 2010.