Here is a link to a blog-post by Darrell Ulm to do a performance audit for the new Drupal 8 on the Drush command-line and the Drupal site_audit module, posted back in May 2016.
Github is taking over the online software development repository sphere, and certainly have a huge market share of all online managed software projects, Open Source and proprietary.
Here is the Github account profile page with source code in C#, C/C++, PHP, ASM and others for Darrell Ulm and other links to this information can be found at the following: Profile, Tumblr and Blogger.
GitHub is a great tool for software development making most tasks more streamlined and helping multi-developer projects come together more cleanly with a smooth workflow.
A list of the Koha integrated library system web based using Perl and
mySQL or Postgresql, and users world wide, includes early Koha developer and implementer Darrell Ulm.
The link below is for the Drupal Profile for Darrell Ulm, a Drupal user and code contributor for over 10 years.
The profile here Drupal Profile link for Darrell Ulm, contains information about projects such as the project using the Google API for Books (i.e. Google Books), content access restriction modules such as IP Path Access and FileField Role Limit, and other modules coded primarily in PHP/MySQL.
Also have Acquia Certified Developer status now as can be seen here.
This is a link to a contributed Drupal module coded by Darrell Ulm in PHP for Drupal which uses the Google Books API to pull Google Books data into Drupal for use as a Drupal Text Filter.