BAYANGTOYS X22 Brushless Dual GPS WIFI FPV with 3-Axis Gimbal 1080P Quadcopter under $250
MANA285 a great ready to fly clone of Vortex 285 that runs on open source software and is an ideal platform for long range.Read more "M285: Affordable InmersionRC Vortex quadcopter clone running Open Source"
STorM32: Open Source 3D Gimbal, affordable aerial cinematographer’s tool takes you places you never dreamt of for a fraction of the price of proprietary products.Read more "STorM32: Open Source 3D Gimbal"
Inexpensive, durable, hackable GPS drone with autonomous return to home and auto-land featureRead more "Bayangtoys X16: Inexpensive, durable, hackable GPS drone."
Microsciky 32 board lightweight built-in brushed ESC, DSM2 and open-source Cleanflight support.Read more "Micro Scisky: The 32bits Open Source Brushed Flight Controller"
How to control almost any toy quadcopter with a $5 nRF24L01 module and DeviationTX firmware.Read more "DeviationTX with NRF24L01 module, the universal drone remote control."
FPV 105 micro quadcopter. Full open source hw/sw 3d printed frame from Thingiverse.Read more "3D Printing an Opensource SW/HW 105 FPV quadcopter"