These are exercises I do to learn a few different technologies, languages and tools. I some cases I get some code form the internet to start and in others I start from scratch or something I read. I try to references to what I used to get started, sometimes I did not and then forgot to do so later.
I did not always do a good job of documenting and not use the best coding practices. I will retrofit these as I get a chance.
Here I keep my notes and links to many resources: Wiki
Here is where I keep some snippets gist