If you are searching for family with links to the UK, here's a mega site that covers literally everything related to genealogical resources in the geographical area.
It is sponsored by Price and Associates, who are experts in English family history and genealogy research.
Among the many links, you'll find some sites in color and this indicates fees are required.
The main categories are Genuki, Burial Indexes, Occupations, Civil Registration (BMD), Census and Census Substitutes, Baptisms, Marriage Indexes, Education & Announcements, Historic Newspapers, DNA, Probate Records, Emigration Records, Migration, Maps and Gazetteers, Monumental Inscriptions, Military Records, Archive Catalogs, Networking with Others, Genealogy Humour, Surname Studies, Surname Distribution Maps, Old Handwriting Aids, Religion, Local Histories, Land and Court Records, Heraldry and Nobility, Records of the Poor, One-Place Studies, and Finding Living People.
As just one example, under Civil Registration (birth, marriage, death certificates), find links to major websites, as well as such lists as death duty (1795-1903), births/marriages/deaths at sea, birth/marriage/death indexes, geographical indexes and more.
Census & Census Substitutes lists both major sites and some esoteric links:
Hemp and Flax Grower’s Index (Dorset, Somerset, Devon 1783-1791)
Hearth Tax 1660s-1670s (Various Places)
Lay Subsidies for London (1292, 1319, 1332, 1541, 1582)
London inhabitants within the walls (1695)
UK and Ireland Records similarly offers records for many geographical areas.
Education and Announcements provides many links for resources (centers, magazines, guides, history, encyclopedias, blogs/newsletters, institutes/societies and more.
There are also Lots of Links to even more links, such as Cyndi's List, Genealogy Links, Looking 4 Kin, 101 Best Web Sites, etc.
Emigration Records provides passenger and immigrant lists, port records, lists of emigrants from and to specific locations, births at sea, Brits in South America, Canadian immigration index, New South Wales (Australia) convict arrivals and registers, and a host of other fascinating links). I barely had time to scratch the surface in my perusal of this list.
In addition, find Networking links, Jewish links, Occupations, Surname Distribution Maps, Handwriting and Language links, Religion links, records for the poor and literally hundreds of other links which lead to additional resources.
Enjoy your exploration of this site!
I look forward to reading the comments and questions of readers who take the time to look at the UK resources site.