catsman
Even so, demanding that a FOSS project (with extremely limited resources) scraps a perfectly fine logo and starts from scratch just because a similar logo exists is simply not a reasonable demand.
1) Intellectual property laws state that the TOX project is not infringing on any copyright unless it directly takes assets from your logo. As you can plainly see, the TOX logo was created from scratch. 2) Even if intellectual property laws did work that way (again, they don't) it's also incredibly obvious that the TOX logo concept was arrived upon totally independently of your logo.
You have no legal ground to stand on in this regard, and a shaky ethical ground considering that you somehow think you're entitled to exclusive rights to this really quite generic idea. ESPECIALLY considering you've been sitting on this idea for well over a year - as far as I know, there's no risk of this project being confused with an existing brand or idea, and there are no actual pieces of software that use this logo.
I'm sorry that you feel like this TOX logo has violated your 'generally accepted rules'. Perhaps they aren't as general as you assume?