VPNs that do no encrypt data?

Yes!
You can see the report on Android (free and not free) VPNs here:
https://research.csiro.au/ng/wp-content/uploads/sites/106/2016/08/paper-1.pdf
And an article summarizing it here:
https://www.techgig.com/tech-news/editors-pick/Avoid-these-10-insecure-VPN-apps-on-Android-88546?mailer_id=2888&utm_source=TG_batch&utm_medium=email&utm_campaign=digest_news_2017-01-26&etoken=cGZzaWx2YUBnbWFpbC5jb20=&activity_name=MjIwNzcw&dt=&auto_login=lKaUjJKbhWOnk7@@OkG6EkpNlR0eASYJcXXFUV1dlR0eASYJWWHhWV15YWFxy&src_type=autoLogin

Industrial security report (2016)

Interesting report on industrial security:
https://securelist.com/analysis/publications/75343/industrial-cybersecurity-threat-landscape/


PS. Kudos to JMM for pointing this out.

RTCA DO-178B Process Visual Summary

For those of you who need to know what DO-178B is like I need nowadays, I was shown by a colleague of mine - who at the work sits 2 tables ahead of me and who by a mere incident has its name on DO-178C - to this visual summary of the DO-178B, Software Considerations in Airborne Systems and Equipment Certification (a document dealing with the safety of software used in certain airborne systems).

Kudos to the summarizing powers of these guys!