FaCiLe is a constraint programming library over integer finite domain written in OCaml. It offers all usual facilities to create and manipulate finite domain variables, arithmetic expressions and constraints (possibly non-linear), built-in global constraints, and search goals. It also allows you to build easily user-defined constraints and goals (including recursive ones), making pervasive use of OCaml higher-order functionals to provide a simple and flexible interface for the user.
Kandau is a library that offers an easy way to store and retrieve C++ objects (and their relations with other objects) into various backends. SQL, XML, and .desktop backends are currently implemented. It may be as interesting for storing configuration information as it is for storing information in a relational database. Furthermore, you can switch the backend without any change to source code, and it is thus transparent to the application developer.
IAM Calendar is a class to display the calendar of a given month in an HTML page. Holidays or other events can be configured to be highlighted in a special way (using CSS styles). The days of the month can rendered with a form checkbox or radio buttons so they can be selected by the user. Rendering of the different calendar elements can be configured using CSS styles. The names of the months and days of the week can be configured to be displayed in a language other than English.