cstrings is a lightweight internationalization tool for C code. It is useful for those who find gettext too bulky and intrusive. It extracts strings from a program, and turns them into #defines in a prepended code section. It has good features for building up your message base incrementally.
FastFormat is a C/C++ output and formatting library whose design parameters are complete type-safety, efficiency, genericity, and extensibility. It is simple to use and extend, highly portable (to any platform or compiler), and it upholds the C tradition of you only pay for what you use. FastFormat supports output and formatting of statements of arbitrary complexity, consisting of heterogeneous types. FastFormat writes to output "sinks", which can be of arbitrary type.
Java+ is a Java preprocessor that adds its features to any Java compiler. It has long, multi-line strings with executable inclusions like Perl or Ruby, optionally segregates Java+ strings into ResourceBundle files, eliminates the need for JSP or ASP and their implied need for Java compilers on deployment servers (a security concern), and adds absolutely no overhead in either space or time. There are graphical and command line interfaces, and a simple, general, and recursive string syntax.
i18nHTML is a collection of scripts that can be used to write Web pages that visitors can translate into their respective native languages. It uses a database to match sentences from the Web page against translations and defines a set of PHP functions that generate either the translated HTML sentences or the original (typically English) text with decorations that allow users to provide translations. It requires that internationalized pages be written using the functions but does not constrain the page design in any way. Internationalized pages can be updated without losing existing translations for sentences that were not changed.
libintl-perl is a library that supports message translation for Perl, written in pure Perl (version 5.004 or better). A faster C version is also built and installed if the system fulfills all requirements. Its interface is a superset of the gettext family of functions in C, and it uses the same file formats as GNU gettext, making it possible to use all tools available for gettext itself and to seamlessly integrate internationalized Perl code into mixed-language projects.