🇧🇩 Bangla language & NLP 73 verified entries

Everything that makes Bangla work on computers: keyboards and input methods, Unicode-Bijoy conversion, normalizers, tokenizers, spell checkers, PDF generation and full NLP stacks. This is the deepest section of Bangladeshi open source — the Avro phonetic lineage alone spans two decades of maintained forks, from the original OmicronLab keyboard through today's Rust engines. Licences matter here and are stated per entry; the BUET research models with non-commercial terms live in the AI/ML section with their ⚠️ flags.

Edit this section on GitHub · Last verified 2026-11-10 · Rules: curation policy

All entries

• OpenBangla-Keyboard The leading open-source Bangla keyboard for Linux — the flagship consumer input method, cross-platform in spirit and the direct descendant of the original Avro that defined phonetic typing in Bangladesh. GPL-3.0 BD org / for-BD
• riti Next-generation Bangla input method engine in Rust — the phonetic-conversion core that modern keyboards embed, built as a library first. MPL-2.0 BD org / for-BD
• jsAvroPhonetic Avro Phonetic conversion in JavaScript — the web-side implementation that powers phonetic typing in browsers. ⚠ No licence file Diaspora
• iAvro Avro Phonetic for macOS — the port that kept Apple users typing phonetically when the original stopped. ⚠ No licence file Diaspora
• Lekho Avro Phonetic input for Apple Silicon Macs — the modern continuation for the ARM Mac era (লেখা = to write). Custom licence ee list
• Bangla-Keyboard Fixed-layout Bangla keyboard for macOS, Windows and Linux from one shared reordering engine — one codebase, three platforms. MIT BD-based
• BornoTSF Lightweight Windows Text Services Framework IME for Bangla typing by Codepotro — system-level input without heavyweight keyboard suites. GPL-3.0 BD-based
• khipro-m17n Compositional Bangla input method — neither phonetic nor an app — for Linux, Windows and Android, built on the m17n framework. MIT BD-based
• Bongo Cross-platform Avro-style phonetic keyboard for macOS, Windows, Linux and Android, built on the riti engine — one project covering every desktop. MPL-2.0 BD-based
• @subhesadek/avro-phonetic Avro Phonetic parser for the web on npm — drop-in phonetic conversion for web apps. MPL-2.0 ee list
• avro.py Avro Phonetic parser in Python — the pip-installable way to convert phonetic strings server-side. Apache-2.0 BD-based
• Bijoy2Unicode Bijoy to Unicode converter — bridging the legacy ASCII encoding that still powers Bangla DTP shops into modern Unicode. MIT ee list
• okkhor Unicode to Bijoy and back, in Rust (অক্ষর = letter) — the conversion layer for Rust services handling legacy-encoded Bangla text. MIT BD-based
• poriborton Unicode-Bijoy converter library (পরিবর্তন = change) — same problem, independent Rust implementation. MIT BD org / for-BD
• upodesh Autosuggest engine for Bangla input (উপদেশ = suggestion) — the predictive layer that makes phonetic keyboards feel fluent. MIT BD org / for-BD
• emojicon Emoji handling with Bangla text — emoji-aware processing for Bangla strings, where naive code breaks grapheme clusters. MIT BD org / for-BD
• ponjika Bengali (Bangladeshi) calendar library (পঞ্জিকা = almanac) — Bangla dates, months and holidays for scheduling code. GPL-3.0 Diaspora
• bangla Number formatting and calendar utilities for Bangla — Bengali numerals and date rendering as a library. MIT Diaspora
• obadh_engine Deterministic rule-based Roman-to-Bangla transliteration engine in Rust, powering the Obadh keyboards for Apple platforms (উবাধ = speech). MIT Diaspora
• bnlp Bangla natural language processing toolkit — tokenisation, stemming, POS tagging and NER in one Python package. MIT BD-based
• bnltk Bangla NLP toolkit in Python — the NLTK-inspired take on the same stack. MIT Diaspora
• BanglaSpeech2Text Offline Bangla speech recognition — pip-installable, runs without cloud APIs, which matters for privacy and for poor connectivity alike. Apache-2.0 BD-based
• bangla-tts Bangla text-to-speech research code — an older research entry kept for lineage (see also the VITS and Katha systems in legacy). ⚠ No licence file Diaspora
• Nirmol Bangla slang detection dataset and API (নির্মল = clean) — content moderation tooling for Bangla platforms. ⚠ No licence file ee list
• BengaliDictionary English-to-Bengali dictionary dataset and tools — a foundational lexicon from the DownGit author. GPL-3.0 Diaspora
• avro-bangla-autocorrect-dictionary-enriched Enriched Avro autocorrect dictionary — better suggestions for the phonetic typing experience. ⚠ No licence file ee list
• laya-bangla Bangla-first LLM routing layer — routing prompts to models based on Bangla-language understanding (লয়া = flow). Apache-2.0 ee list
• bangla-embed-e5-small-banglish Bangla/Banglish sentence embeddings — retrieval and semantic search that handles both scripts and the Romanized mix people actually type. MIT ee list
• bangla-asr-conformer-120m-dialects Dialect-aware Bangla speech recognition — a Conformer model trained to survive regional accents. Apache-2.0 ee list
• indicf5-bangla-tts IndicF5-based Bangla text-to-speech from a Bangladesh-based researcher — Bangla TTS is scarce and this is a working checkpoint ⚠ Gated download, non-commercial research licence BD-based
• whisper-large-v3-turbo-bn-BD Whisper large-v3-turbo fine-tune for Bangla (Bangladesh) ⚠ Gated download, non-commercial research licence BD-based
• Qwen3-ASR-1.7B-bn-BD Compact Qwen3 ASR fine-tune for Bangla — a lighter-weight recognition option ⚠ Gated download, non-commercial research licence BD-based
• BanglaLLM (Hugging Face org) Bangladesh-led org behind the BanglaLLama family, BanglaSafe, bangla-alpaca-orca and 30+ open Bangla models and datasets — the org page is the canonical entry point Licence per model BD-based
• number-to-bangla Convert numbers to Bangla words and digits for Laravel/PHP — invoices, cheques and amounts-in-words without hand-rolled rules. MIT BD-based
• bangla-to-banglish Bangla script to Banglish transliteration on npm — for platforms that still store Romanized Bangla. MIT BD-based
• bangla-likhi Bangla typing made easy (বাংলা লিখি = let's write Bangla) — a friendlier programmatic typing interface. MIT BD-based
• bangla-pdf Generate PDFs with Bangla text in Node — complex-script shaping handled for you. BSD-3-Clause BD-based
• banglapdf Bangla PDF generation for Python — the PyPI counterpart for server-side document pipelines. MIT BD-based
• bangla-web-fonts Bangla web fonts packaged for the web — embeddable font stacks that render Bangla correctly on any browser. ⚠ No licence file ee list
• thikkit Bilingual Bangla-English address parsing (ঠিকানা = address) — turning the freeform addresses Bangladesh actually uses into structured data. MIT BD-based
• bangla-to-english-name-translator Converts Bangla person names to English (শাহানাহিদ → Shahanaheed) — the unglamorous utility every BD database migration needs. MIT BD-based
• transliteration-bangla Banglish-to-Bangla transliteration running ONNX models in the browser — machine-learned conversion client-side, no API calls. MIT BD org / for-BD
• @pantho075/matra Bangla character stroke-order data and heuristics (মাত্রা = matra line) — the data layer for handwriting education apps. MIT BD-based
• bangla-ipa Bangla text to IPA transliteration, by Bangladeshi NLP researchers (open source, GitHub bipsec/bangla-ipa) — phonetic research and speech tooling. see notes BD-based
• bn-i18n-notes Guidelines for translating software projects from English to Bangla, written in Bangla (Codeberg) — hard-won i18n conventions for the language. GPL-3.0 BD-based
• LaTeXbangla Write Bangla (and Assamese) with ordinary LaTeX — typesetting without XeLaTeX gymnastics. LPPL-1.3c Diaspora
• BOOKbangla Book class and templates for writing Bangla and Assamese books with LaTeX memoir — the publishing-ready companion to LaTeXbangla. LPPL-1.3c Diaspora
• sbnltk SUST-Bangla NLP toolkit: NER, POS tagging, stemming, word embeddings (MIT) MIT BD org/for-BD
• Voxcribe Local speech-to-text desktop app and CLI built on faster-whisper, tailored for Bengali transcription — specially tailored for Bengali transcription while offering complete multilingual speech recognition, automatic language detection, real-time streaming. MIT BD org / for-BD
• Bangla Voice Clock Desktop talking clock that speaks the time aloud in Bangla as said in Bangladesh; Flutter, offline — A free talking clock that tells the time aloud in Bangla, the way it is said in Bangladesh.. GPL-3.0 BD-based
• Kothon Offline Windows voice typer (Vosk) for Bangla, English and Banglish that types into any focused app — kothon converts your speech to text locally with Vosk, applies Banglish-to-Bangla normalization, and types the result into whatever application is focused. MIT BD-based
• LipiLab (লিপিল্যাব) Free Bangla Unicode-to-Bijoy converter with DOCX round-trip that preserves formatting; fully client-side — upload a .docx and download it back with the same layout - bold stays bold, tables stay tables; your text never leaves your device. proprietary (all rights reserved) BD org / for-BD
• Bengali Coreference under Low-Resource Constraints Research code and data for Bengali coreference: 41 gold docs beat 141 mixed docs; 66.73 CoNLL F1 best result — 41 gold-standard documents outperform 141 mixed gold + silver ones, for every model tested ... 66.73 CoNLL F1 (MuRIL-Large). MIT BD org / for-BD
• Rickshaw Rong (রিকশা রং) Free OpenType-SVG color Bangla font painted in Dhaka rickshaw-art style; ships the .otf builds, specimen site and a Python build pipeline — README: 'A free Bangla color font, painted in Dhaka rickshaw-art style' — dist/RickshawRong-Regular.otf downloadable, shaping from Baloo Da 2, online generator at tool.teamzlab.com. OFL-1.1 BD-based
• Odri for Windows Native Windows TSF input method turning phonetic Latin typing into Bangla script in real time; ships an installer and prebuilt x64 releases. GPL-3.0 BD org / for-BD
• Orus-OCR-0.1 Small CPU-fast OCR for Bangla, English and mixed handwriting-first pages; returns language, handwriting flag and structured text — README: '1.06M-parameter CTC line recognizer... Bangla handwriting 6.9% CER' vs 'Indra OCR 1.1: 84.6% (BN-HTRd)' — frozen release with weights, train.sh recipe, 8.4MB pipeline, run.py CLI. MIT-NC (custom; det.onnx upstream OpenRAIL-M) BD org / for-BD
• Bornotoron (বর্ণতরণ) Framework-free Banglish-to-Bangla writing tool: dictionary-first spelling from 4,000+ entries, homophone choices and learned corrections — README: 'Ami banglay likhchi → আমি বাংলায় লিখছি... 4000+ spelling entries. Zero frameworks. Your words stay yours.' — Avro-inspired engine, tests, offline PWA. MIT BD org / for-BD
• Shobdo Keyboard Offline Android keyboard for Bangla (Probhat), Banglish phonetic and English, 13 themes, no INTERNET permission, no ads and no trackers. MIT BD-based
• Project Lip Sync Web tool that dubs English YouTube lectures into Bangla: Claude translation, Edge TTS voices, FFmpeg muxing and a dual-audio web player. MIT BD org / for-BD
• Borno-LM From-scratch decoder-only Bangla language model (152M params) in PyTorch: SentencePiece tokenizer, corpus training, checkpoints, generation — "builds a SentencePiece tokenizer, streams a small Bangla text corpus, pretrains the model, saves checkpoints, and generates text" — 152,510,976 parameters verified in-notebook.. MIT BD org / for-BD
• Bangla Calendar (বাংলা ক্যালেন্ডার) Windows desktop widget showing the Bangla date, full Bangla calendar, seasons and system-tray support; published on Microsoft Store — "A beautiful Bangla date widget for Windows... Display current Bangla date, full Bangla calendar view, current Bangla season" with Microsoft Store listing 9pcmxnfhvb6f.. Apache-2.0 BD-based
• Uchcharonai (Uccharon AI) Bangla pronunciation coach web app: record your voice, get a transcription, and see mismatched words highlighted against a target sentence. ⚠ No licence file BD-based
• Bangla Voice Typing Chrome extension (Manifest V3) that types punctuated Bangla text into any text box from speech, with spoken punctuation commands — "Speak Bangla. Get clean, punctuated Bangla text typed straight into any text box... Adds punctuation (including the Bangla দাঁড়ি ।), removes fillers (আ, উম, হুম)" — v2.1.0, hold Alt+C.. MIT BD org / for-BD
• bangla-calendar Convert JavaScript dates to the Bangla (Bengali) calendar. ⚠ Licence unspecified BD org / for-BD
• bangla-date-converter Comprehensive Bangla date converter with extensive formatting options. ⚠ Licence unspecified BD org / for-BD
• bn-translit Bidirectional Bangla-Banglish transliteration with slugify support. ⚠ Licence unspecified BD org / for-BD
• avro-bangla-engine The Avro Phonetic engine packaged for modern JS use. ⚠ Licence unspecified BD org / for-BD
• avro-bangla-suggestions React hook for Avro Phonetic Bangla suggestions and autocomplete. ⚠ Licence unspecified BD org / for-BD
• bn-ansi-to-unicode ANSI (Bijoy) Bangla font text to Unicode converter in TypeScript. ⚠ Licence unspecified BD org / for-BD
• bd_number Bangla/English number conversion utilities. ⚠ Licence unspecified BD org / for-BD
• bangla-support Bangla digits and Bangla calendar date utilities. ⚠ Licence unspecified BD org / for-BD
• bangla-stdlib A standard library of Bangla language functions. ⚠ Licence unspecified BD org / for-BD
• jquery.bangla Versatile Bangla input tool for the web (jQuery). ⚠ Licence unspecified BD org / for-BD

How this section is verified

• Every link is fetched live at verification time — dead links are removed, not kept for history.
• Bangladesh connections are evidenced (profile location, org page, or the product's own docs) — see the scope rules.
• Dormant items (3+ years without activity) move to the legacy file with their last-activity date.
• Licence information is quoted as the publisher states it; gaps are flagged with ⚠️ rather than guessed.