I build and share these tools. You may want to have a quick look at:

sotable 

Make any HTML table sortable

Letter for iA Writer 

An iA Writer template to create letters with correctly positioned address fields.

markdown-it-scrolltable 

A markdown-it plugin to wrap any <table> into a <div> for horizontal scrolling on narrow screens. Examples Usage Examples # A markdown table Column | Column------ | ------Cell …

markdown-it-fitmedia 

A markdown-it plugin to set aspect-ratio of responsive images, make them lazy loading, and to make videos responsive. Images Wrapping media Usage Configuration Images # Responsive images …

active-toc 

Highlight your TOC entries while scrolling

Compose CSS 

Compose CSS is a personal investigation and tool-building effort. I´m trying to find out for myself what is useful to have in a CSS library …

stacked-area 

An npm package to draw a SVG stacked area chart with a day-based x-axis.

cumulative-flow 

An npm package to draw a SVG cumulative flow diagram and predict the anticipated completion of work.

horiz-gauge 

An npm package to draw a SVG horizontal gauge. Play with the settings of the horiz-gauge by visiting the horiz-gauge playground.

somap 

An npm package with a sorted map and sorted set, implemented as a binary tree.

Breakdown for Atom 

Breakdown is a package to be added to your Atom editor. It allows you to display and manipulate a breakdown structure of your JIRA Scrum …

dheader 

An npm package to make the header of your web pages dynamic.

Tracker 

File your workout routines and get a nice graphical overview of your achievements and improvements.

Spitfire 

A virtual whiteboard to be shared by multiple people at the same time. Users will be anonymous – so no one needs to sign in.