Frequently requested info/resources at meetups
The SAFE explained
These are the canonical Y Combinator: SAFE documents
Valuation cap, discount and MFN explained
ASA explained (UK version of SAFE, eligible for EIS/SEIS tax relief)
The Art of Pitching Online from SAC
Pitchdecks - The Good, the Bad and the Ugly
Y Combinator: Seed pitch deck advice and template, How To Perfectly Pitch Your Seed Stage Startup With Y Combinator's Michael Seibel
How to Craft a Polished Startup Profile on Investor Connection Platforms such as Gust
Entre Tramites is an excellent, yet affordable company with English speakers that can handle all the key procedures such as company formation, payroll, VAT, taxes, social security registration, etc. They offer free initial consultations., and also handle a variety of other admin. In Spain its advised to use "gestors" of this kind rather than trying to do it yourself.
Good guide to autonomo insurance.
The same person that runs this site can help, including giving feedback on your pitch deck.
Cost-efficient and fast MVPs from Start-app
Vtiger is free for startups
Twenty is open source if you self-host.
Consider Bigin.
Zoho offer a full featured Invoicing solution for free.
Zoho has a full suite of email, CRM, etc. that is typically much cheaper.
Depending how many users you have, consider Once as a Slack alternative.
Blck Rhino can offer affordable consulting services.