GroupDocs.Signature for .NET - Version 1.6.0 GroupDocs.Signature for .NET is a flexible library that allows developers to build new or enhance existing apps with electronic signature functionality. The library provides a flexible API and comprehensive controls for creating custom e-signature workflows of any complexity. Key features include: 1. Electronic Signature Capture Control. Provides users with options to sign documents either by uploading a scanned copy of their signature, typing a signature with custom font styles, or drawing a signature with a mouse, touch or a stylus. Handwritten signatures can be drawn and applied to a document right in a web-browser. 2. Multiple Document Formats Support. All documents are signed in PDF format for security. However, the library can convert over 50+ file formats to PDF, so that users can get them e-signed as well. Among supported file formats are: Microsoft Word, Excel, PowerPoint, Visio, OpenDocument, RTF, CSV, TXT,