1) I don't know which one is newer, outline.com is just the one that I know, never heard about the other one.

2) That's right! Nevertheless we have a problem where there are either 2...n software solutions with the same name (like here) or where the names are so fictional that you'd never guess what the software is about when hearing the name.

My point was: Let's find better ways to name our app/software, so that it's clearer which one we are talking about.

Trademark. There are a great many that are generic words. Fortunately they are limited to the markets the owner is participating in and the consumer confusion test relieves trademark squatting somewhat.