Custom Addins...

[JohnBonifas1]

In ArcGIS 10.3, If I want to develop a .esriaddin file (addin), is the ArcObjects SDK required? Is VBA still supported, or do I have to develop the addin in Python?

Thanx

[DanPatterson_Retired]

the help files are the best place to start.

if you are referring to developing analysis tools for use in arcmap using python... start here

A quick tour of creating tools with Python—Help | ArcGIS for Desktop

should be looking for web based options, the the other side of the developer divide would best be address by Robert Scheitlin, GISP​ or Rebecca Strauch, GISP​ amongst

You might also want to decide upon which side of the developer divide to move your post to given the structure of GeoNet as outlined here GeoNet Community Structure

[RebeccaStrauch__GISP]

By tools sets, do you mean something like a python addin? That is, something you can easily package and distribute? Just in case it is....

What is a Python add-in?—Help | ArcGIS for Desktop

Here is info on addins I have included in a blog Tip: Python Addin - getting custom tools/toolbox to work - GPToolDialog

for what it's worth.  Keep in mind that all though toolboxs will still be able to be used in Pro, if you go that route, as least for now, addin will not.

[DanPatterson_Retired]

circular https://community.esri.com/message/603795#comment-603795