Weed-FS is a simple and highly scalable distributed file system. There are two objectives: to store billions of files, and to serve the files fast! Instead of supporting full POSIX file system semantics, it implements only a key-file mapping. Instead of managing all file metadata in a central master, it manages file volumes in the central master and lets volume servers manage files and the metadata. This relieves concurrency pressure from the central master and spreads file metadata into volume servers' memories, allowing faster file access with just one disk read operation. It is modelled on Facebook's Haystack design paper. Only 40 bytes of disk storage are required for each file's metadata, and disk reads are O(1).
Nibble Forms 2 is a PHP form class which allows developers to quickly create HTML5 forms and validate submitted results. An evolution of the original Nibble Forms class, it follows some of the key principles of Nibble Forms: It's simple to instantiate, it uses simple form field calls, it's flexible, and it provides validation out of the box.
cQRCode is a class that generates QR code images in GIF, JPEG, and PNG formats. It takes a string of information to encode and can either serve the image with the current script output or save it to a file. The size of matrix points and the error correction level parameters are configurable.
cronbot is a wrapper script for cron jobs. Rather than running your job/script directly, you run it through cronbot, and it will allow a little more control to help keep things from getting out of hand. The default behavior is to only allow one instance of your job to run. This can be changed with the --duplicate option. You can also pass in a maximum time of execution for a job or add a random amount time to delay the start of your job. By default, jobs are run with a default "nice" value, which is usually 10.
Ferret is a copy-detection tool, locating duplicate text or code in multiple text documents or source files. It is designed to detect copying (collusion) within a given set of files. Ferret is useful for document analysis, tracking changes to or reuse of text in documents; for software developers, looking for duplicate code to refactor; in software evolution, studying how code has changed over time; for teachers, looking for collusion or plagiarism in student work; and for tracking the amount of new material in the current version of a text or program.
QuantComponents is a framework for financial time-series analysis and algorithmic trading, based on Java and OSGi, with an Eclipse front-end. It is highly modular: usable as a plain Java API, OSGi components, or integrated into Eclipse. It works standalone or with a client-server architecture, depending on performance and reliability needs, and is integrated with Interactive Brokers through the IB Java API. Its generic broker API means that it can easily be extended to work with other brokers. A backtesting facility and an extensible SWT charting library are provided.
DtSQL is a universal database query and editor tool for developers and database administrators. It supports Cache, DB2, Derby, Firebird, FrontBase, H2, HSQLDB, Informix, Ingres, JDatastore, MaxDB, Mckoi, Mimer, MySQL, Oracle, PointBase, PostgresSQL, Solid, SQLite, SQL Server, SQL Anywhere, and Sybase (ASE). It allows you to browse schemas, tables, columns, primary and foreign keys, constraints, views, indexes, triggers, stored procedures, functions, and sequences. You can create, alter, view, and drop tables, views, indexes, constraints, stored procedures, functions, triggers, and sequences, and edit table data including binary/BLOB and CLOB data types.