Over the last year or so, Samuel Bernou created 20 Blender add-ons to accomplish small tasks such as quickly converting video sequences into a video file, maintaining a list of code snippets, object renaming, rendering blueprints and background rendering. The collection is amazingly broad, check it out!
Some people told me to share my add-ons on community places because they only stumbled upon my github or videos by accident. So I made demo videos for add-ons that might be mosts interesting in my opinion.
And the link to the github repositories (I try to keep each readme well documented).
Hope you find something usefull.