Improvements to docs.

DISPLAYS.md

@@ -64,6 +64,16 @@ hardware: these are easy to port to MicroPython. Only a minimal subset is
 needed to support these GUI's, with the result that the drivers can be very
 simple. See [this doc](./DRIVERS.md#7-writing-device-drivers) for details.
 
+# Links
+
+#### [Device driver document.](./DRIVERS.md)
+
+#### [nano-gui](https://github.com/peterhinch/micropython-nano-gui)
+
+#### [micro-gui](https://github.com/peterhinch/micropython-micro-gui)
+
+#### [Writer and CWriter](https://github.com/peterhinch/micropython-font-to-py/blob/master/writer/WRITER.md)
+
 [1d]: https://github.com/peterhinch/micropython-nano-gui/blob/master/DRIVERS.md#22-drivers-for-ssd1331
 [2d]: https://github.com/peterhinch/micropython-nano-gui/blob/master/DRIVERS.md#21-drivers-for-ssd1351
 [3d]: https://github.com/micropython/micropython/blob/master/drivers/display/ssd1306.py

DRIVERS.md

@@ -61,6 +61,7 @@ access via the `Writer` and `CWriter` classes is documented
        5.2.3 [EPD public bound variables](./DRIVERS.md#523-epd-public-bound-variables)  
   6. [EPD Asynchronous support](./DRIVERS.md#6-epd-asynchronous-support)  
   7. [Writing device drivers](./DRIVERS.md#7-writing-device-drivers)  
+  8. [Links](./DRIVERS.md#8-links)  
 
 The [Micropower use](./DRIVERS.md#515-micropower-use) section is applicable to
 EPD's in general but makes specific reference to the 2.9" micropower demo.
@@ -1180,4 +1181,14 @@ If this produces correct output the GUI's can be expected to work.
 Authors of device drivers are encouraged to raise an issue or PR so that the
 library can be extended.
 
+# 8. Links
+
+#### [Device driver document.](./DRIVERS.md)
+
+#### [nano-gui](https://github.com/peterhinch/micropython-nano-gui)
+
+#### [micro-gui](https://github.com/peterhinch/micropython-micro-gui)
+
+#### [Writer and CWriter](https://github.com/peterhinch/micropython-font-to-py/blob/master/writer/WRITER.md)
+
 ###### [Contents](./DRIVERS.md#contents)