The ATLAS (Automatically Tuned Linear Algebra Software) project is an ongoing research effort focusing on applying empirical techniques in order to provide portable performance. It provides C and Fortran77 interfaces to a portably efficient BLAS implementation, as well as a few routines from LAPACK.
FusionCharts Free is a flash charting component that can be used to render data-driven and animated charts for your Web applications and presentations. It is a cross-browser and cross-platform solution that can be used with ASP.NET, ASP, PHP, JSP, ColdFusion, Ruby on Rails, simple HTML pages, or even PowerPoint presentations to deliver interactive and powerful flash charts. You do not need to know anything about Flash to use FusionCharts. All you need to know is the language in which you're programming.
LlamaXML is a C++ XML parsing and formatting library that is small enough to be used on handheld devices like PDAs and smartphones, while still supporting larger desktop and server systems. The library currently runs on Palm OS Garnet, Palm OS Cobalt, Windows Mobile, Windows, and Mac OS X, and is easy to port to new platforms. The entire library compiles to only 45 KB of code under Codewarrior for Palm OS, and can be even smaller if only some of its features are used. The library is also frugal with runtime memory, using a single-pass streaming algorithm that only stores the current parsing stack in memory, allowing very large XML documents to be parsed with very little overhead.