Tools

Business Model Canvas - http://businessmodelgeneration.com/downloads/business_model_canvas_poster.pdf
Your business model, in one page. Great way to really get to understand what makes your business tick.

Lean Canvas - http://leanstack.com
Version of the business model canvas, designed for lean startup business (i.e. launch fast, iterate).

Design UI Tools
Moqups - https://moqups.com/ - allows two active projects for free.

Source Code Repositories and Version Control
Many free and hosted solutions exist for version control and source code repositories.

GITHub - https://github.com
GitHub is a web-based repository hosting service, offering distributed version control and the source code management functionality of Git. GitHub provides a graphical user interface and mobile integration. It also provides additional collaborative features including bug tracking, wikis and task management.

GitHub is very popular in the open source community, with over 3.4 million users and offers both a free and paid for service.

Bitbucket - https://bitbucket.org
Bitbucket is a web-based repository hosting service written in Python and implemting the Django web framework. Bitbucket supports repositories using either Mercurial or Git. Bitbucket is very similar to GitHub, and offers both a free and paid for service. The free service limits to 5 members in a repository, although this can be increased by inviting new users, e.g. a team of 8 invites three new members to Bitbucket, all 8 members can access the repository.

Windows Azure - http://azure.microsoft.com/en-gb/pricing/free-trial/
£125 free trial with no credit card or ongoing charges, hosting natively for asp.net, node, php, ruby all the things. Can deploy websites direct and automatically from git. Ask mentor Brian Norman if you want any help or advice

OnePulse - http://www.onepulse.com
Instant market research. Sign up and you can get 100 responses to three questions for free within a couple of minutes.

Prezi - http://prezi.com
Prezi is a cloud-based presentation package which enables a team of users to collaborate together. Prezi can also be downloaded to mobile devices such as the iPad.

Google Drive - https://www.google.com/drive
Google Drive is the home of Google Docs, Sheets and Slides, a clouse based office suite enabling excellent collaboration between team members. Google Drive is free to use, but users are required to have a Google account. It is important to also note that files shared publicly on Google Drive are available to web search engines.

CartoDB http://www.cartodb.com
Visualize and analize location data like google spreadsheet but for maps. Free entry level available that will work for your prototypes.

Mapbox http://www.mapbox.com
Brilliant service offering web and mobile mapping based on OpenStreetMap data. Allows complete customization of the map styling including themed and branded maps, checkout there mapping tool called MapboxStudio