Win/CE GPS client library component reads and decodes standard GPS NMEA 183 sentences from the RS232 serial port as well as compute great circle distances and bearings. Several eVC example programs with full source code are included. Requires Windows Embedded Tools eVC compiler. Registration is $105 ($195 with source) for email delivery.

PDFOne .NET
Gnostice PDFOne .NET is a component which provides a rich set of APIs to View, Print, Create, Fill and Read PDF Forms, Secure, Merge, Split, Stamp PDF documents.

ASP Printer COM
Print your reports, Text data / files, RTF data / files, PDF files and HTML files from any programming language including VB, VB.NET, ASP, ASP.NET, C#.NET, VC++.NET, HTML, VB Script, Java Script, MS Word, MS Excel, MS Access, VBA and MS Office, etc.

Image to PDF Dynamic Link Library
Convert JPG, PNG, GIF, BMP, PCX, TGA images to PDF documents royalty free using DLL which can be used with most development environments. Supports clickable image stamps (eg company logo), bookmarks and can create simple full screen PDF slideshows.

ezBarcodeComponent
Barcode .net library supports Codabar, Code11, Code128, Code39, Code39Ext, Code93, Code93Ext, Ean13, Ean8, Industrial2of5, UccEan128, MSI, Postnet, Planet, Telepen, UpcA, UpcE, IntelligentMail, Sscc18, Scc14, Itf14, PDF417, DataMatrix, QRCode.

SMTP & POP3 Email Engine for C & C++
SMTP / POP3 C/C++ email component library uses a simple API to send and receive mail, including HTML and MIME attachments, from an application. Knowledge of Winsock & TCP/IP not needed. Not dependant on support libraries. Supports MFC & C++ Builder.