PDFCool Studio is an easy-to-use but powerful PDF document handler. It enables you to create, edit, sign, compare, split, combine, replace, encrypt and convert PDF documents.
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LibreSign Alternatives
LibreSign is described as 'Web application for electronic signatures (e-Sign) that offer the possibility of signing documents online with security and agility' and is a E-signature tool in the development category. There are more than 100 alternatives to LibreSign for a variety of platforms, including Web-based, SaaS, Windows, Android and iPhone apps. The best LibreSign alternative is PDFsam, which is both free and Open Source. Other great apps like LibreSign are Adobe Acrobat DC, BentoPDF, Master PDF Editor and DocuSeal.