Did you know that CRM Together (Sage CRM Development gurus) has an Open Source Code sharing program for Sage CRM?
At My CRM Manager, we use the WYSIWYG field within our internal Sage CRM instance for managing Cases. For different client projects, we have used the CRMSignature code and the Rapid Item Picker (sometimes referred to as Quick Line Entry). And loads of partners (including us) use the Sage300-charts-in-crm code to make the Sage 300 CRM integration more meaningful.
So, beyond publishing Accelerator, MobileX, and 365, CRM Together does a lot to give back to the global CRM community. If your company develops Sage CRM, you should definitely check it out.