BTF-LIGHTING LED Strip Solderless DIY Connector Adapter

• Connects strips together, or makes it easy to "bend" or put breaks in the strips.
• No soldering required
• Can have a slightly loose connection, so look for tension in the pins. 

HWELL LED Strip Lights Connectors 3pin - 10mm Solderless

• Easy to connect to strips
• Bare wires on one end make it easy to clip alligator clips, solder, or connect to your microcontroller in other ways

BTF-LIGHTING JST SM 3 Pin Connectors for WS2812B

• Marries with the connector typically found on NeoPixel or WS2812B strips
• Inexpensive
• A bit hard to connect/disconnect, so not great for projects that require constant connection/disconnection

ALITOVE Core Male Female Plug LED Connector Waterproof IP65

• Waterproof
• Pre-tinned wires
• Stable connection
• Use for outdoor Bike Lights

Striveday 20 AWG 3 conductor wire (Red & Black & yellow)

• Thick cable with strong exterior coating.
• A little bit hard to bend, so not for close or tight connections
• There is some powder inside the cable, Use a cloth to wipe off the powder when stripping the wires.

3 Pin PCB Mount Screw Terminal Block Connector

• These terminal blocks make it easy to connect the LED strip connectors above to a breadboard.
• Use a small screwdriver to trap the wires inside. 

3D printable neopixel strip corners:

Check it out here on Thingiverse.