Magick.NET

/github.com/BcryptNet/bcrypt.net) Logging: - Microsoft has their own basics for this, but there are also a lot of 3rd party solutions, you can see a maintained list here: https://docs.microsoft.com/en-us/aspnet/core/fundamentals/lo... (I personally use Serilog). Serialization/Deserialization: - Microsoft have just added their own internal JSON serializer to .NET Core, so you should probably use that where you can, but it doesn't have anywhere near the same features that Newtonsoft's Json.NET does, so if you're in need of those then that's still the battle-tested standard (https://github.com/JamesNK/Newtonsoft.Json). Time: - Personally I've never had a reason to use it over the standard DateTime, but I've heard good things about NodaTime (https://github.com/nodatime/nodatime) Images: - System.Drawing still exists in the standard library for Core, but it's Windows only I believe - ImageSharp is a great library for native image stuff in .NET Core, works across all platforms (https://docs.sixlabors.com/index.html). There was some hullaballoo a little while back about it's license, but that appears to be resolved now as it's Apache 2. - There's also an ImageMagick library if that's your jam (https://github.com/dlemstra/Magick.NET) Networking: - .NET obviously has it's own httpclient, but it's worth mentioning Polly here (https://github.com/App-vNext/Polly). It allows you to extend the default Http Client with short circuits, automatic retries, exponential backoffs, etc. Databases: - Probably doesn't need saying, but Entity Framework for an all in one migration, entity mapping and database access library (https://github.com/dotnet/efcore). Since moving to Core, it's also a lot faster now, although I think it's still lacking a couple of features from the old framework version. - Dapper is focussed on being fast and simple (https://github.com/StackExchange/Dapper) - NHibernate is also still a really powerful database library, even if I think it's API kinda sucks (https://github.com/nhibernate/fluent-nhibernate)