Add info about pdfHTML and pdfSweep to README

Author: pavel-alay

README.md

@@ -19,9 +19,10 @@ The **iText 7 Community** source code is hosted on [Github][github], where you c
 
 You can also [build iText 7 Community from source][building].
 
-We also have a Java tool that can help you debug PDFs:
-- ```itext-rups-x.y.z.jar```
-RUPS is also hosted on [Github][github-rups]
+We also provide opensource add-ons and tools to complement the core functionality:
+- [pdfHTML][pdfhtml] — allows you to easily convert HTML to PDF or iText objects
+- [pdfSweep][pdfsweep] — a highly efficient PDF tool to merge, split and redact data
+- [RUPS][rups] — a Java tool that can help you debug PDFs
 
 If you have an idea on how to improve **iText 7 Community** and you want to submit code,
 please read our [Contribution Guidelines][contributing].
@@ -46,9 +47,11 @@ Contact [sales] for more info.
 [agpl]: LICENSE.md
 [building]: BUILDING.md
 [contributing]: CONTRIBUTING.md
-[itext]: http://itextpdf.com/
+[itext]: https://itextpdf.com/
 [github]: https://github.com/itext/itext7
 [latest]: https://github.com/itext/itext7/releases/latest
-[github-rups]: http://github.com/itext/rups
-[sales]: http://itextpdf.com/sales
+[sales]: https://itextpdf.com/sales
 [gratis]: https://en.wikipedia.org/wiki/Gratis_versus_libre
+[rups]: https://github.com/itext/rups
+[pdfhtml]: https://github.com/itext/i7j-pdfhtml
+[pdfsweep]: https://github.com/itext/i7j-pdfsweep