Hi Pryci, for content planning I use skedgram and later. Based on my experience,
they are the best. I use also flodesk, tried mailchimp and others lead
generation tools, but didn't work well for me. I heard Hubspot is a great tool
too

Try https://contentstudio.io

For Post Scheduling: SocialBee.io.

Content Planning: I usually stick to Google Sheets.

Lead generation: a mix between Lemlist, Phantombuster, Zapier, LinkerIn,
Neverbounce.

Hi

Post scheduling: Later

Content planning: I use Google Sheet, but you can try with Asana, Planable or
Airtable

Lead generation: HubSpot, Marketo, or LinkedIn

For post scheduling, I will suggest to try Social Champ loaded with handy
features that includes bulk upload, All-in-one calendar and much more. It makes
easier to automate your posts on different social platforms that includes
Facebook, Twitter, Instagram (with direct publishing), Pinterest and Google My
Business. https://www.socialchamp.io/

And yes for Content planning, Google Sheet would be a good choice.

If you need any assistance, feel free to discuss