A couple of notable examples include Pathguy's D&D Next character generator. He closed his generator last month, leaving a closing message, but now the generator is back and running, noting that "I've been granted specific permission by WoTC to publish and distribute this generator. However, I've been asked to limit my "Fifth Edition" character generator to the content of the free online D&D Basic Rules."
That's not the only one that's risen from the grave! The d20 Fight Club for Fifth Edition iOS app was removed from Apple's App Store, citing an actual "cease and desist order from Wizards of the Coast". This, too, is back, under a new name! The creator notes that "To be compliant with Wizards of the Coast copyrights and trademarks this app will no longer contain any content from the Dungeon Master's Guide or use the trademarks "Dungeon Master" and "D20"