Available for pre-order, the KickStarter-backed Androidly is an Android 2.2 wrist-phone with a 2-inch, 320 x 240 touchscreen, 416MHz CPU, 256MB RAM, and up to 16GB of storage. Features a GSM cellular modem, WiFi, Bluetooth, GPS, and 2-megapixel camera.
I'm Watch runs a custom Android build on a 454MHz CPU, and features a 1.5-inch 240x240 touchscreen, WiFi web access, and cellular voice. It can operate standalone or as a companion to a Bluetooth-connected Android or iOS phone. Hundreds of apps available.
Open source, button-controlled watches that run on 16-bit microcontrollers and use Bluetooth sync with smartphones to push updates, notifications, and apps. Optimized for Android and hacker-oriented, it offers Linux dev tools and primitive device support.
Fitness-oriented 1.6-in. touchscreen MotoACTV has an 8GB MP3 player, GPS and sensors to track distance, time, speed, and with a strap accessory, a heart-rate monitor. The MotoACTV runs a custom Android build on its 600MHz CPU and syncs to Android phones.
This Kickstarter-funded smartwatch may not run Linux, but its open source SDK supports an Ubuntu development platform. The button-driven device displays alerts from Bluetooth-connected Android or iOS phones on its 1.26-inch epaper display.
Runs a slimmer version of Android and requires a Bluetooth connection to an Android (preferably Xperia) phone. Apps push social networking updates and notifications to the 1.3-inch OLED touchscreen, which offers basic control of music and other functions.
Born in Denmark and raised on Kickstarter, the Leikr sportswatch runs Linux on a 500MHz processor. It stands out with a 2-inch, 320x240 color touchscreen and a fast-linking GPS, and offers 8GB flash, WiFi, USB, and access to OpenStreetMap and Endomondo.