Alternatives and similar repositories for captcha:

Users that are interested in captcha are comparing it to the libraries listed below

• lanycrost / whois-server
  WHOIS server builded in Golang and using Postgres as a DB.
  ☆11Updated 6 years ago
• ciehanski / onionbox
  Send and receive files securely through Tor.
  ☆42Updated 2 years ago
• mback2k / smtp-dkim-signer
  SMTP-proxy that DKIM-signs e-mails before submission to an upstream SMTP-server.
  ☆37Updated last year
• foxcpp / wirebox
  Dynamic WireGuard tunnel configuration.
  ☆15Updated 2 years ago
• emersion / go-smtp-proxy
  A go-smtp-server backend that proxies messages to another SMTP server
  ☆26Updated 3 years ago
• dimalinux / spoofsourceip
  Golang/gopath example for spoofing UDP source IP addresses
  ☆69Updated 5 years ago
• emersion / klaes
  An OpenPGP keyserver
  ☆18Updated 4 years ago
• flashmob / maildir-processor
  MailDir processor package for https://github.com/flashmob/go-guerrilla
  ☆21Updated 8 years ago
• albertito / spf
  SPF (Sender Policy Framework) implementation in Go [mirror]
  ☆21Updated last year
• gesquive / templr
  An iptables firewall manager
  ☆20Updated 6 years ago
• berty / go-libtor
  Self-contained Tor from Go
  ☆34Updated 2 years ago
• emersion / go-openpgp-hkp
  A Go library for OpenPGP HTTP Keyserver Protocol (HKP)
  ☆12Updated last year
• shuque / dane
  Go library for DANE authentication
  ☆21Updated 7 months ago
• xaionaro-go / secureio
  An easy-to-use XChaCha20-encryption wrapper for io.ReadWriteCloser (even lossy UDP) using ECDH key exchange algorithm, ED25519 signatures…
  ☆34Updated 4 years ago
• mostfunkyduck / kp
  reimplementation of the kpcli utility in go with added features.
  ☆11Updated last week
• schollz / fbdb
  File based database
  ☆14Updated 4 years ago
• opencoff / go-proxies
  SOCKSv5 and HTTP Proxy Server in golang
  ☆19Updated 4 years ago
• peterzen / goresolver
  DNSSEC validating resolver library
  ☆22Updated last year
• elliotwutingfeng / go-fasttld
  go-fasttld is a high performance effective top level domains (eTLD) extraction module.
  ☆37Updated this week
• anacrolix / tagflag
  declarative flag parsing for Go using struct tags
  ☆11Updated last year
• tylerchr / pwnedpass
  Package pwnedpass is a Go package for querying a local instance of Troy Hunt's Pwned Passwords database.
  ☆15Updated last year
• vsergeev / tinytaptunnel
  a point-to-point layer 2 tap interface tunnel over UDP/IP with HMAC-SHA256 authentication, written in Go.
  ☆61Updated 10 years ago
• etix / goscrape
  Go library to scrape torrents on any UDP tracker
  ☆20Updated 6 years ago
• ChandraNarreddy / sillyproxy
  SillyProxy - Dynamic SNI based TLS proxy for terminating TLS (>=1.1) HTTP connections to multiple domains.
  ☆22Updated 3 years ago
• kitschysynq / darity
  A wafer-thin, pure Go interface to KVM
  ☆10Updated 9 years ago
• shuttleone / sanswallet
  Golang implementation of a BIP32, BIP44, BIP49 and BIP84 compatible hierarchical determinstic wallet
  ☆14Updated 6 years ago
• urlund / nginx-mail-auth-http
  A Go HTTP authentication server for ngx_mail_auth_http_module.
  ☆6Updated 6 years ago
• Snawoot / httptrap
  Web-server which produces infinite chunked-encoded responses to slowdown malicious clients
  ☆21Updated 3 years ago
• bradleyfalzon / tlsx
  Unused Go package to inspect client hello message from Go application
  ☆46Updated 7 years ago
• txthinking / mailx
  A lightweight SMTP mail library
  ☆29Updated 2 years ago