As far as I can see, none. There was some discussion recently about Secret coming back into vogue, but that seems to have fizzled in the past fortnight.
The sad thing is, a lot of these apps are really successful in the outset, but then end up burned as the companies try, heavy handedly, to monetise.
As much as the startup world sees themselves as morally above the like of Google who will sell out customers, many startups seem to sell out both their customers and their product, making fundamentally incompatible changes with what they were built on in the pursuit of cash.
The sad thing is, a lot of these apps are really successful in the outset, but then end up burned as the companies try, heavy handedly, to monetise.
As much as the startup world sees themselves as morally above the like of Google who will sell out customers, many startups seem to sell out both their customers and their product, making fundamentally incompatible changes with what they were built on in the pursuit of cash.