Hi,
I have some retopology to do this week so I created this code to help me.
The addon allowsz you to make retopology with Bsurface and looptools.
It’s free and I hope you will like it 
SUPPORT ON DISCORD > https://discord.gg/ctQAdbY
The addon is really simple, select your reference object and click on Setup Retopo.
You can add the reference in the reference object or by selecting the reference and launching the tool, that will add it directly.
the addon creates a mesh, you are in edit mode and you juste have to draw Grease pencil lines and click on Add Bsurface.
The addon keeps a shrinkwrap modifier ON, like that when you add Bsurface, the vertex are snapped on the ref surface.
You can of course delete the Shrinkwrap if you want and at it later with the X at the right of the reference object.
The two icons at the right of Add Bsurface are Occlude Geometry and Align to X.
On the Mirror, you can Hide it, activate the Clipping, Apply it and remove it.
the Mirror use the Auto mirror code (no need to install automirror) and then you can cut your object and add mirror directly.
The GStretch is a looptools tool.
The Space is a Lopptools too, but combined with a Relax from Looptools.
Bridge and Gridfill you know them
The Last tool, Relax is a modified version of Laprelax.
If you have a selection, the relax will be on the selection, if not, the relax will be on the entire mesh.
As you can see, this is pretty simple and you don’t need 10 addons to make your retopo, the addon use only Bsurface and Looptools.
If the addons are not activated, you will have a message asking you to activate them.
On the preferenences you can switch the menu in the T or N panel, change the category name and Use the pie menu or not.
If the addons are not activated, you will have this.
Like I said, the addon is really simple, I hope you will like it.
Available on Gumroad.
Have fun
Will use along all your other excellent addons.
