Which of the items below are worth mentioning in my admission documents? I really worried about what should I write in my admission documents, such as resume/CV, statement of purpose, informal email communications with professors. From the list below, please tell me what items have enough academic value to be mentioned in such documents?

Note that its a application in PhD program in computer science for US universities 


Stack Overflow (generally Stack Exchange) reputation and badges
Coursera accomplished courses
Small-scaled programming projects (absolutely with no academic value)
Github programming repositories
This list does reflect your technical abilities and not your research-based activities.

Therefore, all things listed here should be packaged and be presented under a section
(e.g., such as 'Related Technical Activities'); to represent your technical abilities to program and contribute (e.g., Github).