EMF Validation Builder is an Eclipse plugin that automates the validation process at the time of saving. This means that resource problem markers are up to date as soon as you save your model. A dependency table is maintained, which allows the validation process to be re-run when necessary. In particular, the tool can be directly used with ECore model files.
Android Saripaar is a simple, yet powerful rule-based UI validation library for Android. It following features declarative style validation powered by Annotations, synchronous and asynchronous validations (you don't have to worry about threading), compatibility with Stock Android Widgets, custom view dependencies, quick setup (just download the jar and include it in your libs project folder), removal of most of your validation logic from your code, and compatibility with other annotation frameworks such as AndroidAnnotations, RoboGuice, etc.,
allowHTML is a PHP class that can be used to filter insecure HTML by following OWASP AntiSamy rules. It can parse HTML documents using DOM document objects and then remove unsafe tags, attributes, and CSS parameters. It uses a configurable whitelist to determine which tags, attributes, and CSS style parameters are allowed. The class may also apply filtering rules defined in a separate AntiSamy XML rules file.
Serene is a validation engine that implements the JAXP 1.3 Validation Framework API for RELAX NG based on an algorithm centered on providing good messages and having a clear handling of ambiguity and conflicts. It has an implementation of the JAXP Validation Framework API for ISO Schematron and support for Schematron markup embedded in RELAX NG schemas.
validator.py is a tool for ensuring that data conforms to certain sets of rules, called validations. A validation is essentially a schema for a dictionary, containing a list of rules for each key/value pair in the dictionary you want to validate. This is intended to fill a similar use case to form validations in WTForms or Rails, but for general sources of data, not just Web forms.
JS Date Range Picker is a package to let the user pick a range between two dates. It can be used to present two form inputs that let the user choose dates using calendar pull down menus. The dates may be validated so the range end date is not set to a day before the range start date. The format of the dates and the week start day are configurable parameters. The chosen dates are returned in the ISO-8601 extended format.
php-iban is a PHP library for parsing and validating IBAN bank account information. All parts of an IBAN can be retrieved, including country code, checksum, BBAN, financial institution or bank code, and where a fixed-length national system is in use, also branch/sort code and account number. The parser was built using regular expressions to adapt the contents of the official IBAN registry available from SWIFT then only manually modified for a few special cases. Various deficiencies in the initial adaptation have since been rectified, and the current version should be a fairly correct and reliable implementation.