Blade API Monitor, a developer spy tool, can trace and log API and ActiveX interface with parameters. It can trace any exported functions of any DLLs, log all API call information, predefine 8000+ APIs' prototype, and it supports MAP PDB Files, etc.
Lychee Project is a premium API service that provides 100% up-time for dedicated Facebook marketers. Due to it don't fuss with Facebook's plethora of updates, now more and more social marketing application(based on Facebook API) using this project.
The CardWerk SmartCard API is a product family that provides easy smart card access for developers programming in the Microsoft .NET environment. The SmartCard API class libraries support all .NET programming languages such as Visual Basic.
WebNMS SNMP API Android Edition offers a lightweight Java library to build SNMP-based network management applications for android powered devices.
WebNMS SNMP API offers a comprehensive development toolkit for SNMP-based network management applications.
PowerPoint-to-Flash API for .
The API consists of two classes "sdnsNetAPI" and "zone".
The PrintableCal API is a free library for extending PrintableCal to support additional calendar template styles and data sources. The API includes the required assemblies, documentation, and examples.
ApexSQL Diff API programmatically compares and synchronizes SQL Server database tables, views and all other SQL Server objects as well as database data. Compare and synchronize directly from a custom application. SQL Server 2012 support.
ApexSQL Log API programmatically reads SQL Server Transaction Log. View transaction log data and audit changes programmatically. SQL Server 2012 support.
VeryPDF Cloud REST API can be used to convert document formats on the cloud. VeryPDF Cloud REST API contains 20+ functions to process PDF files and convert between various kinds of document formats.