curl and libcurl is a tool for transferring files using URL syntax. It supports HTTP, HTTPS, FTP, FTPS, SCP, SFTP, TFTP, DICT, TELNET, LDAP, POP3, IMAP, SMTP, RTSP, RTMP, and FILE, as well as HTTP-post, HTTP-put, cookies, FTP upload, resumed transfers, passwords, port numbers, SSL certificates, Kerberos, and proxies. It is powered by libcurl, the client-side URL transfer library. There are bindings to libcurl for about 40 languages and environments.
The Tecla library provides programs with interactive command line editing facilities, similar to those of the Unix tcsh shell. It supports recall and editing of previously entered command lines, TAB completion of file names and application specific tokens, and in-line wild-card expansion of filenames. The optionally reentrant modules which perform TAB completion and wild-card expansion are also available separately for general use. The library is smaller, more modular, makes more efficient use of the heap, and has a less restrictive license than GNU readline.
Poedit is a gettext translation (.po file) editor for Unix, Windows, and OS X. It aims to provide translators with a simple, easy to use user interface with all the essential tools such as spellchecker or translation memory. It can also be used to manage translations for small projects.
FCFS RWLock is a first-come first-served readers/writers lock for POSIX threads. FCFS means that the first thread to request control of the lock will gain it, based on the constraints of a readers/writers lock. FCFS RWLock is well documented and commented, so it can easily be used as a reference implementation.
OSSP cfg is a ISO-C library for parsing arbitrary C/C++-style configuration files. A configuration is sequence of directives, each directive consists of zero or more tokens, and each token can be either a string or again a complete sequence. This means the configuration syntax has a recursive structure and allows you to create configurations with arbitrarily-nested sections. The configuration syntax also provides complex single/double/balanced quoting of tokens, hexadecimal/octal/decimal character encodings, character escaping, C/C++ and shell-style comments, etc. The library API allows importing of a configuration text into an Abstract Syntax Tree (AST), traversing the AST, and optionally exporting the AST again as a configuration text.