What app could open text from anywhere in the editor of your choice? On my previous installation, I had a small tool that took text from e.g. a web form after pressing e.g. ⌘ + E, pasted it in the editor of my choice where I would edit it. After saving, it was pasted back to the original place. The app was on the App Store in its early days, later pulled and still available from GitHub.

I can't remember its name, can you?

Thanks.
Thanks to jherran’s comment I found the app: QuickCursor from Hog Bay Software (GitHub repository).