PFBC is an object-oriented PHP class for building HTML forms. It includes AJAX support, jQuery, reCAPTCHA, TinyMCE, and CKEditor. It features integration with Bootstrap, a front-end framework from Twitter that incorporates responsive CSS (meaning your forms not only look great and behave well in the latest desktop browser, but in tablet and smartphone browsers as well). It supports HTML5 form elements and attributes.
BorderFlow implements a general-purpose graph clustering algorithm. It maximizes the inner to outer flow ratio from the border of each cluster to the rest of the graph. The main advantage of the algorithm is that it does not need parametrization to compute results of high accuracy.
treap.py is a treap implementation for Python. A treap is a hybrid of a binary tree and a binary heap that is self-balancing and is O(nlog2(n)) for most operations, including deleting a value, inserting a value, finding the least value, and finding the greatest value. This particular treap implementation looks like a dictionary to the caller, but it also supports getting an ordered list (forward or reverse) in O(n) time. The code is available as pure Python (should run on about any Python implementation supporting generators, but was tested on CPython 2.6) or as part Python and part Cython for performance. The version with Cython should run on CPython or Unladen Swallow, but was only tested on CPython 2.6.