This is a splittable 40 pin dual male jumper wire, it is super flexible, can be transformed from 1-40 pin jumper wire. With some of these, you will no need to worry about the jumper wires you got before do not fit your project, just split it and go.
The D1 is an Arduino Uno-like wifi board based on ESP-8266EX.
11 digital input/output pins
1 analog input(3.3V max input)
a Micro USB connection
a power jack, 9-24V power input.
Compatible with Arduino
Widora-AIR V6.0 is an ESP32 (ESP8266 successor with bluetooth) board that is very thin and can be stacked on a breadboard. You can start prototyping you app with bluetooth 4.0 and wifi in a few minutes. Moreover, you can use atom, arduino and other ide to develop for it in a range of languages (C, C++, LUA, Python, etc.)
This is a power module for the standard bread boards (Small and Medium sized). It's concave design so will not wast your proto zone. It also supports both 5v and 3.3v (both can be enabled on each power rail).
We think it is a must to have on your workbench, really.