Reworked demos overview page. (#275)

* Reworked demos overview page.

* Fixed typo.

Author: FranFin

_docs/tutorials/demos/overview/index.md

@@ -5,20 +5,26 @@ redirect_from:
   - /docs/tutorials/demos/
 ---
 
-In addition to the above tutorials, we created a collection of demos that showcase micro-ROS in real applications which are easy to reproduce by the community — and thus _you_. Unlike tutorials, we do not explain the demo code step by step, but provide ready-to-use Docker files to get you started as quickly as possible.
+In addition to the above entry-level tutorials, we created a collection of demos that showcase micro-ROS in real applications which are easy to reproduce by the community — and thus _you_.
+Unlike tutorials, we do not explain the demo code step by step, but provide ready-to-use Docker files to get you started as quickly as possible.
 
+Below, you can find a table
 Choose yourself:
 
-|              | [**Kobuki Demo**](../kobuki_demo/) | [**Crazyflie Demo**](../crazyflie_demo/) | [**ToF Sensor Demo**](../tof_demo/) |
+| Demo |  | _RTOS_ | _Hardware_* |
 | --- | :-: | :-: | :-: |
-| _RTOS_       | NuttX                             | FreeRTOS                                | Zephyr                             |
-| _Hardware\*_ | Kobuki, Olimex LTD STM32-E407     | Crazyflie, radio, flow deck             | ST B-L475E-IOT01A Discovery kit    |
-| _HW Costs\*_ | ≈ 360$                            | ≈ 330$                                  | ≈ 60$                              |
-|              | <img src="kobuki.png" style="margin:auto;"/> | <img src="crazyflie.png" style="margin:auto;"/> |  <img src="tof_sensor.png" style="margin:auto;"/> |
+| [**Kobuki Demo**](../kobuki_demo/) | <img src="kobuki.png" style="margin:auto;"/> | NuttX | Kobuki Turtlebot2, Olimex LTD STM32-E407 |
+| [**Crazyflie Demo**](../crazyflie_demo/) | <img src="crazyflie.png" style="margin:auto;"/> | FreeRTOS | Crazyflie 2.1 Drone |
+| [**ToF Sensor Demo**](../tof_demo/) | <img src="tof_sensor.png" style="margin:auto;"/> | Zephyr | STM32L4 Discovery kit IoT |
+| [**OpenManipulator-X Demo**](../openmanipulator_demo/) | <img src="openmanipulator.png" width="70%" style="margin:auto;"/> | Zephyr | Robotis OpenMANIPULATOR-X, Olimex LTD STM32-E407, Raspberry Pi 4 |
+| [**Interfacing with FIWARE Context Broker**](../fiware_demo/) | -- | -- |
+| [**DemoBox Power and Boot Time**](../demobox_demo/) | <img src="olimex.png" width="35%" style="margin:auto;"/> | NuttX | Olimex LTD STM32-E407, Raspberry Pi 4 |
+| [**Thumper, a six-wheeled robot**](../thumper_demo/) | <img src="thumper.png" width="45%" style="margin:auto;"/> | NuttX | Wild Thumper 6WD, Olimex LTD STM32-E407 |
+| **MoveIt 2 Demo** | <img src="tof_sensor.png" style="margin:auto;"/> | Zephyr | STM32L4 Discovery kit IoT |
+| [**Combined Demos**](../combined_demos/) | -- | -- |
 
-<div style="font-size:80%;color:gray;text-align:right;margin-bottom:1em;">*As a matter of course, you'll need a computer/laptop, various cables, and<br/>further auxiliary equipment. The hardware costs are only a rough estimate.</div>
+<div style="font-size:80%;color:gray;text-align:right;margin-bottom:1em;">*As a matter of course, in addition to the hardware detailed above, you'll need a computer/laptop, various cables, and further auxiliary equipment.</div>
 
 The demos may also interface with the FIWARE Context Broker, which is the core of the [FIWARE](https://www.fiware.org/) open source initiative for context data management. Learn more at [**Interfacing with FIWARE Context Broker**](../fiware_demo/).
 
 Finally, the demos can be combined in several ways to demonstrate further functionalities. Turn to [**Combined Demos**](../combined_demos/) to learn more about these combinations and how to launch them.
-