Some popular 3rd party providers are listed here;

[[https://boxsoft.net/|BoxSoft]]
Home of various Super Templates by Mike Hanson

[[https://www.capesoft.com/clarion|CapeSoft]]
Hugely popular accessories

[[https://www.icetips.com/|IceTips]]
Current home of the PAR2 archive, Build Automator and other great tools.

[[https://noyantis.com|noyantis]]
A specialist in COM wrappers and lots of other goodies.

[[https://ohnosoft.com/|ohnOsoft]]
Analyze.It!, SQL.Script.It!, Update.It!