I don’t use pocket like services myself but when I’m looking for alternatives I like to start at alternativeto.net. It’s a great tool for questions like this.
Good shout, that site is a real lifesaver! I'd also like to throw SaaSHub and LibHunt into the mix, the latter is a bit more niche since it only does open source but it does have apps like Omnivore, one of the alternatives I suggested in another comment.