Justin Tadlock

X3P0: Progress is a block that allows users to create progress bars using a straightforward interface.
The block lets you add progress for nearly any type of goal:
<ul>
<li>Percentage: Outputs a percentage from 0% to 100%.</li>
<li>Decimal: Outputs a plain decimal number.</li>
<li>Currency: Create financial progress bars, choosing from a list of worldwide currencies.</li>
<li>Unit: Choose from a complete list of browser-supported units, such as yards, feet, liters, millimeters, and much more.</li>
</ul>
The output of the progress bar is highly customizable. Aside from standard block options, such as spacing, alignment, and border control, users also have a range of design tools at their disposal.
This block outputs proper <code><progress></code> and <code><label></code> elements in the markup. This should aid in accessibility, ensuring that all potential visitors to your site can read what the value of the progress is.

Progress Bar Block

A customizable progress bar block to visually track completion toward any percentage, numeric, financial, or unit-based goal.

brianmcculloh

A very unobtrusive and light-weight reading progress bar indicator showing the user how far scrolled through the current post or page they are. You can control placement and color of the progress bar, and you can choose whether it includes just the main content or also the comments.
The progress bar only displays once the user begins scrolling the page so it is as unobtrusive as possible. Once the user stops scrolling or scrolls down past the content the progress bar subtly mutes until it is needed again.
There is also a reading time commitment feature that you can separately enable. Control the placement (above or below title, or above content), style, and whether it displays on posts and/or pages. Uses 200wpm as the metric for average reading time.
You can also place the time commitment label anywhere you want via the [wtr-time] shortcode.

Worth The Read

Looks very promising, but on my site, nothing was added.

Absolutely does not anything :(

An adjustable progress meter showing how much of the post/page the user has scrolled through, and a read time commitment label near the post titles.

Progress Bar Block vs Worth The Read