I build and share these tools:
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A composable CSS Toolkit to build fast, maintainable, and responsive websites.
Display and manipulate a breakdown structure of your JIRA Scrum project - even offline and only eventually connected to your JIRA system.
A virtual whiteboard to be shared by multiple persons at the same time. Users will be anonymous - so no one needs to sign in.
A sorted map and a sorted set, implemented as a binary tree.
Make the header of your web pages dynamic.
Draw a SVG horizontal gauge.
Draw SVG cumulative flow diagrams and predict the anticipated completion of work.
Draw SVG stacked area diagrams with a day-based x-axis.
File your workout routines and get a nice graphical overview of your achievements and improvements.