# Documentation If you're new here, start with the [Tendermint Intro](/intro). To start building an ABCI application and integrating with Tendermint, see the [App Development](/docs/guides/app-development) and [App Architecture](/docs/guides/app-architecture) guides. To learn more about running the Tendermint software, see the [Using Tendermint Guide](/docs/guides/using-tendermint). To learn more about Tendermint's various pieces, check out the [Documentation](/docs). For a deeper dive, see [this thesis](https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9769). There is also the [original whitepaper](https://tendermint.com/static/docs/tendermint.pdf), though it is now quite outdated. You might also be interested in the [Cosmos Whitepaper](https://cosmos.network/whitepaper), which describes Tendermint, ABCI, and how to build a scalable, heterogeneous, cryptocurrency network. For details on how the software has changed, and what changes are in store, see the [Changelog](https://github.com/tendermint/tendermint/blob/master/CHANGELOG.md) and the [Roadmap](https://github.com/tendermint/tendermint/blob/master/roadmap.md). If you're interested in contributing, see our [Contributor Guidelines](https://github.com/tendermint/tendermint/blob/master/CONTRIBUTING.md) The Tendermint [Software Ecosystem](/ecosystem) contains many example applications and related software built by the Tendermint team and others. Check it out for some motivation and inspiration! See our [Community](/community) page for more ways to collaborate. You can also [get in touch with the team](/contact). Most importantly, enjoy!