We ❤️ open source

Few things are more fun than discovering that someone has already gone to the trouble of solving your problem for you in the form of an open-source software (opens in new tab) project.

In the case that no one has solved your problem yet, it can be very satisfying to invent a solution in the form of an open-source software project—especially if your project becomes successful.

We've experienced both scenarios in our work on address verification software, and we've created some successful open-source projects that we've shared with the world. In some cases, "successful" is a word which means that we had a need, wrote some software which met the need, and eventually published the code to GitHub (opens in new tab). Here is a listing of some of that code, grouped according to a few simple categories. Feel free to check out the code. We hope it's helpful!

Changelogs

Much of our code is actually closed-source, but that hasn't stopped us from publishing an open-source changelog for said closed-source software:

github.com/smartystreets/changelog (opens in new tab)

Smarty SDKs

We've built SDKs that allow easy integration with each of our cloud APIs. Each is completely open-source and hosted on Github:

• .NET SDK (opens in new tab)
• Go SDK (opens in new tab)
• iOS SDK (opens in new tab)
• Java SDK (opens in new tab)
• Javascript SDK (opens in new tab)
• PHP SDK (opens in new tab)
• Python SDK (opens in new tab)
• Ruby SDK (opens in new tab)
• OpenAPI Spec (opens in new tab)

Testing tools

• gunit (opens in new tab) - xUnit-style testing in Go.
• assertions (opens in new tab) - Comprehensive assertion functions for Go.
• scantest (opens in new tab) - Auto test runner (with web UI) for Go tests.
• GoConvey (opens in new tab) - BDD testing for Go in the browser.

Libraries that facilitate testing

• clock (opens in new tab) - Drop-in replacement for time.Now, time.Sleep allowing control over time in tests.
• logging (opens in new tab) - Drop-in replacement for the Go log package which captures log statements.
• random (opens in new tab) - Generates randomized values in production, deterministic values for testing.

Utility libraries

• version-tools (opens in new tab) - POSIX-compatible shell scripts with no dependencies to facilitate calculation of semantic version values and to tag SCM (Git, etc.) repositories with a version.
• scanners (opens in new tab) - Variations on the bufio.Scanner interface over various types of sources (csv, strings.Fields, fixed-width, etc.).
• nu (opens in new tab) - Convenient constructor functions for Go standard library types.

The web

• detour (opens in new tab) - An alternate, MVC-based, approach to HTTP applications in Go.
• s3 (opens in new tab) - Signs requests to Amazon S3. A near drop-in replacement for http.NewRequest.

Wireup and devops

• configo (opens in new tab) - Flexible application configuration for Go programs.
• metrics (opens in new tab) - Instrumentation for Go applications.
• go-packaging (opens in new tab) - Various packaging tools for Go.
• apt-transport-s3 (opens in new tab) - S3 transport for APT.
• raptr (opens in new tab) - A simple, shell-based APT Repository builder and updater.

Research and development

• go-disruptor (opens in new tab) - A port of the LMAX Disruptor to the Go language.
• mafsa (opens in new tab) - Minimal Acyclic Finite State Automata in Go. Sounds fancy, huh?