There are 3 repositories under vba-ide topic.
Every programmer needs a rubberduck. COM add-in for the VBA & VB6 IDE (VBE).
Code Blocks relating to everything VBA
Export & Import VBA code for use with Git (or any VCS)
Enhance your projects with a standalone VBA development framework that provides debugging, source control, and Test Driven Development tools with 100% VBA.
VBA code indentation add-in for 64- and 32-bit host applications
Kurz Microsoft Excel IV. Expert: Programovanie vo VBA
VBE Extras ... extending the VBA editor