Looking for ideas for Package

I am a full stack developer  , Have also worked on Salesforce integration with NopCommerce .  I have some time in hand so looking to create an open source package , I would push it to Github for the community to use . 

Is there any idea anyone can pitch ? or do i need into blackbaud , hubspot etc to  get some inspiration on what plugin is popular there ?  

Looking for ideas <3 

Rohit