I did a search today and found a variety of free online plans. Pinterest seems to have a quite a bit of stuff too, but I am a luddite in terms of social media so I don't have an account there.
Can't say anything about the relative merits as I have never built a uke before.
Here are a few sources starting with StewMac. This kit assembly guide has drawings.
https://www.stewmac.com/freeinfo/i-5348/i-5348.pdf
Oaktown has a nice variety of uke plans
https://www.oaktownstrings.com/free-instrument-plans
Fairly basic plan.
https://woodgears.ca/ukulele/plans.html
Crane is a japanese site specialising in older guitars but has a 5 string uke plan. This is one of the two pages of the plan.
http://www.crane.gr.jp/CRANE_etc/A010_C ... 2_2010.pdf
This french site has a uke plan as well as a number of guitar plans.
http://www.grellier.fr/fr/telechargements
I have a semi-prepared back and sides for a small guitar that I never got round to making - I reckon that might end up as a tenor uke. I would need to rebend on of the sides to make a cutaway or stick with a more conventional regular shape. We'll see. Ditto a guitar top where my rosette is not well put in. Most of the rosette would be cut away so flip it over and cover up whatever might be visible.