The other day you may have seen some test posts here on trying to cross-post between blogs. It turns out there are surprisingly few wordpress apps for this, and those that exist are not being maintained. I have a ManageWP account where I can simultaneously post to multiple accounts with the same post, but that was not exactly what I was looking for. So I thought of my IFTTT account, which I had not played around with for a while.
I am not really an expert on this space, but I have used a site / program called "If This Then That" (IFTTT.com) for several years. What it does is set up simple rules to fire off certain actions based on triggers. For example, I cannot stand iphoto and the absolute mess of duplicates that icloud and iphoto make, so I now have an IFTTT rule that every time my iphone takes a picture, it automatically puts it in a folder on my Google Drive account. I have IFTTT rules based on everything from my Nest thermostat at home to highlighting items in my feed reader.
IFTTT is really easy to use, but part of that is that there are limited options. One limitation is that for each object - eg Twitter account or WordPress Account - you can only have one version. In other words, if I have 3 WordPress accounts, IFTTT can only recognize one so, obviously, IFTTT is not going to be able to trigger based on a post at one blog and then do something on another blog. Which is exactly what I wanted to do. Whenever I make a climate post at Coyote Blog, I wanted to cross-post it at Climate Skeptic.
So I tried a similar site called Zapier. Zapier allows me to do exactly what I wanted with WordPress accounts, and for each trigger and action it seems to give me, from my limited poking around, a lot more choices than IFTTT. For example, a lot more different WordPress events can act as a trigger. So I am now using it to cross-post, and we will see how it works.
Overall, IFTTT is a bit more mature, it has more choices of integrations, and probably most important has both iphone and android apps that give it a lot of integration options with your phone. The limitation to one instance of each sort of trigger or action is a limitation they have been promising to fix for years, but still have not addressed. Zapier is more complicated to use, but for the triggers and actions it has, gives a lot more options. Unfortunately, it does not have much, if any, iphone or android integration which I think is a huge limitation for this type of functionality.
Both are worth checking out. They are free (up to a point) and you can create a rule without programming in less than five minutes on either, so you can see if it is something you find useful.
Again, I am not an expert on this space and if there is a third, better choice, let me know in the comments.