1.x -> 2.x addons map/alternatives?

[TheLaw]

I'm doing an upgrade of some sites and am wondering if anyone knows of a resource or post/chart that has good suggestions for migration of addons/plugins from 1.x to 2.x. Some of these could prove to be challenging, e.g., Waindigo's Custom Fields since if it's not supported in some other form then the data needs to be migrated to a new addon.
1.x -> 2.x addons map/alternatives?

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