USB Mini Hub with Power Switch - OTG Micro-USB : ID 2991 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Combination WiFi + Bluetooth 4.0 USB Adapter : ID 4827 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits

USB Mini Hub with Power Switch - OTG Micro-USB

USB Power Only Cable with Switch - A/MicroB : ID 2379 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits

USB Mini Hub with Power Switch - OTG Micro-USB : ID 2991 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits

SERT 125150: USB-2.0 4-Port micro-USB OTG hub, black at reichelt elektronik

USB Mini Hub with Power Switch : ID 2998 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Ethernet Hub and USB Hub w/ Micro USB OTG Connector : ID 2992 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits

TUSITA Micro USB HUB Adaptor with Power, 3-Port Charging OTG Host Cable Cord Adapter Compatible with Raspberry Pi 2 3 Pi Zero Android Smart Phone Tablet Samsung Galaxy HTC Sony Google

TUSITA Micro USB HUB Adaptor with Power, 3-Port Charging OTG Host Cable Cord Adapter Compatible with Raspberry Pi 2 3 Pi Zero Android Smart Phone Tablet Samsung Galaxy HTC Sony Google

Zero4U - 4-Port USB Hub without Pogo Pins [v1.3] : ID 4115 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits