This developer has written a collection of gadgets for coding in Common Lisp, consisting of various convenience macros and such. Links to these are nicely grouped and collected here:

https://www.hexstreamsoft.com/libraries/

Notwithstanding all of the hoopla surrounding that user's behavior, and inflated claims of his own importance, it is obvious to me that code like:

https://github.com/Hexstream/place-utils/blob/master/main.li...

shows some solid Lisp skills.