Python, Flask, Postgres, Slack API, Heroku. Set a daily standup time, have bot message in a channel requesting daily standup reports, and optionally have your standup report be emailed to a specified email address each day. Has instructions for local setup and Heroku setup.
These can be found in: Slack-Standup-Report-Bot/templates/homepage.html and they could be worded better. (Clearly I'm not great with words!)
Feel free to make a pull request with updated verbiage.