Yes you can use both the Coalition and Common apps to apply to more colleges. HBCUs have one app for 50+ colleges. Many colleges also have their own application which you can use. QuestBridge does allow one to apply to many schools so see if you qualify for that program…speak with your GC.
Make sure to run the NPCs before you apply to see if each school is affordable…this can save you a lot of application time and effort and make sure you only apply to schools that you can attend if accepted. Also, make sure to use application fee waivers where ever you can.