A giant set of utility classes originally start back in the .Net 2.0 days and updated until .Net Core and .Net Standard became a thing. At which point I took the library and broke it up into a ton of smaller libraries. View my profile for more up to date versions of everything.
SQLHelper is a wrapper around DbConnection/DbCommand and a micro ORM. It automatically handles batching, data conversion, transactions, etc. for you. It's been around even longer than Dapper as part various libraries I've had over the years.
A multi threaded web crawler library that is generic enough to allow different engines to be swapped in.