BL-6 (2 or 3 cell brushless)

Input: 2 or 3 Li cells
Max current: 6A
BEC: 5V @ 0.8A
Low voltage motor speed reduction
Weight w/wo wires: 3.0g/1.8g
All connectors JST 1.5mm

Brushless one-cell ESC

Details 

Input voltage: 2.9V to 4.2V
30-second current: 3A
Motor slows on low cell voltage.
Cut-off voltage user adjustable (2.9V to 3.3V).
Motor timing user adjustable.

HF100 ESC (1.5A) 0.9g

Details 

For brushed motors
Input: 4.2V to 12V
Max current: 1.5A
Switching freq: 100kHz
Weight w/wo wires: 1.9g/0.9g
Resolution: 256 steps
Motor speed reduct. @ 4.2V
All connectors JST 1.5mm
Wiring harness

YGE Bidirectional ESC (8A) 1.2g

Details 

For brushed motors
Input: 4.8V to 8.4V with BEC
(Up to 12V without BEC)
Max current: 8A forward & reverse
Weight: 1.2g without wires
Switching frequency: 3kHz BEC: 5V @ 1A
Rx conn: Hitec/JR 2.5mm