Catappult to Aptoide, Meizu, Softonic, Transsion, Apptoko, Gionee, Cherry mobile, Multilaser. Very slow in processing (weeks). It started to charge an annual fee of $79.
Apkmirro. Very slow in response.
F-Droid is for open source software, so it is not useful for most apps.
GetJar. It requires more than other sites for submission (e.g. screenshots, icons, description...), but it takes no more than 48 hours for approval.
