Chirr looks good, by a fellow IHer @kossnocorp, but I'm wondering if Hypefury is a more business oriented tool, also by IHers @samy_ and @YannickVeys. Buffer has non-Twitter stuff I don't really need. I just found Zlappo by @simplisticallysimple, seems to be pretty good as well. Lots of IHers making Twitter apps I see.
Any other suggestions?