This is a related "show and tell" to the https://news.ycombinator.com/item?id=46307973 but with the aim of listing only projects that succeeded(are profitable) while being based in the European Union. As "we" all know, it is orders of magnitude harder to succeed in EU due to bureaucracy, language barriers and lack of financing. This topic aims to highlight projects that were able to make it despite all the road blocks of the EU environment.

I myself am not yet profitable, so I won't use this as self promotion. But It would be good to hear your struggles and how you've overcame them. In other words, give some background/story as inspiration to others.