published by com.apished

9 listings on this page, in order of arrival. Each one has its own page with README, repository facts and source links.

1. APIShed
   Validates PESEL/NIP/REGON/IBAN/Luhn/ISBN/EAN/SWIFT-BIC/VAT; RPN calc, date math, hashing, tokens
2. Checksum Validator
   Validates Luhn, IBAN, ISBN, EAN/UPC, SWIFT/BIC, and EU VAT checksums and formats.
3. Date Math Calculator
   Date arithmetic: day differences, business days, age, leap years, day-of-week, add/subtract.
4. Hash Digest Tool
   Computes MD5, SHA1, SHA256, SHA512, and CRC32 digests from text, base64, or hex input.
5. PESEL/NIP/REGON Validator
   Validates Polish PESEL, NIP, and REGON checksums; PESEL also decodes birth date and sex.
6. Regex/Email/URL Validator
   Regex matching, email/URL format validation, and JSON Schema validation.
7. RPN Calculator
   Evaluates Reverse Polish Notation (postfix) expressions: arithmetic, trig, logs, bitwise ops.
8. Text Tools
   Exact character/word counting, reversal, palindrome checks, indexing, sorting; Unicode-safe.
9. Token Counter
   Counts tokens under OpenAI-compatible (tiktoken) encodings, by model or encoding name.