Songsterr

Songsterr provides interactive guitar, bass and drum tabs with rhythm notation, covering songs by artists including Metallica, Led Zeppelin, Guns N' Roses, Nirvana, Radiohead, Ozzy Osbourne, AC/DC, Red Hot Chili Peppers, Black Sabbath, Iron Maiden, Queen, Pink Floyd and System of a Down. Tabs can be searched by instrument across guitar, bass and drums, and a Songsterr Plus tier and a My Tabs account feature are available for registered users.

Its ads.txt file lists 77 ad system lines, made up of 23 direct entries and 63 reseller entries, with MEMBRANA EUROPE B.V. named as a sales house.